These stains have a brown appearance. We have even seen it happen on sand filters, but only a few times. For instance, the upper midwestern states (Ohio, Michigan, Indiana, Illinois, Wisconsin and Minnesota) are challenged with notorious iron problems. What are the names of Santa's 12 reindeers? Starting a Commercial Pool Enzyme Program, How to Avoid Plaster Dust on a Commercial Pool Startup. Mineral Buildup. Ferric iron, for example, is not as easy to sequester as ferrous iron. If the iron was not yet oxidized in the pipes en route to the swimming pool, it sure will be when it is met with chlorine or a secondary oxidizer like ozone. Swimming pool industry offers iron remover that works effectively to deplete iron levels in your pool waters. They just bind metals to prevent oxidation and staining. Super Iron Out is safe to use in an empty pool to remove staining from walls, liner, etc. In either case, if stains are already present, a citric/ascorbic acid might be needed to lift the stains. The citric acid in lemons works by dissolving mineral stains, even iron and magnesium. Can I use a 50 watt heater in a 2.5 gallon tank? Operate your pump and filter settings. A super simple way to get rid of most organic pool stains is to shock the pool and give your pool a little TLC with a good brushing. Copper can get into water from products like copper algaecide, mineral disinfection systems, and from corroding heat exchangers or copper pipes. If your pool is already full and is challenged with iron problems, there are options to physically remove iron from the pool. For instance, a 2″ fill line on a commercial pool will need a larger, more expensive iron filter than a garden hose filling a residential pool. https://naturalpoolproducts.com/wp-content/uploads/2020/04/iron.png, /wp-content/uploads/2017/05/Natural-Pool-Products-Logo.png. If you have gray or dark colored stains, then fiberglass or iron particles may be the culprit. Remove stains. Brush your pool with a wire brush and, if the water is clear enough, vacuum to WASTE. 4 Steps to Remove Iron Pool Stains Step 1: Lower chlorine to 1.0 ppm Lower your chlorine reading to less than 1.0 ppm by either using chlorine nuetralizer or … Our chelating agent NaturallyFREE is proven to chelate ferric and ferrous iron, but it is very slow to remove stains. Below we will discuss ways to control metals like iron, but first, let’s talk about where iron comes from. Before and after images of pool stains. Similarly, you may ask, what causes brown stains in swimming pools? They do need to be replaced periodically; no filter has unlimited capacity. Sequestering and chelation do not remove metals from the water. You should run the pump for at least an hour after adding any chemical. Caused by corroded pool fixtures and misplaced metal objects left in the pool We could try to explain the chemical formulas and reactions, but you can read these three sources if you are interested in that level of detail. Such iron filters have a wide range in price depending on the removal rate you need, and the flow rate of your water. Test your pool water the fast way. Stains come in many different colors, and there are entire businesses devoted to stain removal. All of this is done underwater without draining your pool.. Iron is the typically the cause of the stain but lawn fertilizer, staples, bobby pins, etc are the products that fall in and start the process. This vinyl lined pool in Sydney had a very heavy iron stain that had been present for more than three years. © Copyright 2020, Pure Planet Science & Technology, Inc. Stains occur when metals get oxidized and become insoluble. But another reason for the introduction of this amount of iron into your pool is even more surprising: if you have a rusting iron fence or anything else made with iron around your pool, a heavy rain can expose it to your water. An additional step of lifting the stain back into suspension is necessary. just not in a full pool. will pool shock remove stains? Brush the surface of the pool to see if the stain is removed. If it lifts, then you have an organic stain. Vinyl is more resilient when it comes to staining, but it's not immune. More on that in a moment. Certain areas of the United States have more iron in their tap water than others. Run my pool pump. © AskingLot.com LTD 2021 All Rights Reserved. If any of these stains start appearing, it is important that you adjust the alkaline levels of … Fix green pool water. Removing rust stains. In many cases, your pool suffers high quantities of iron when the source of water is well. If these components have been worn down (like having low pH water flowing through them long enough), iron is sure to find its way into the pool. Source 1, Source 2, or you can go down the Wikipedia rabbit hole as we did. If the iron was not yet oxidized in the pipes en route to the swimming pool, it sure will be when it is met with chlorine or a secondary oxidizer like ozone. Caused by everything from leaves, dirt, bugs, and berries, to algae, worms, and bodily oils; Metal pool stains. Metals are the easiest thing for chlorine to oxidize, and therefore the first things to be oxidized. HASA 76121 Super Stain Out, Quart. If you live on iron-bearing water and don't have a sand filter, go buy one. Remove any pool cleaner before you begin and read all instructions. Super Iron Out is not recommended for pool water. What causes brown stains in vinyl liner pools? Luckily, for pool owners, the FerriTabs product works wonders in swimming pools, both in-ground pools and above ground pools. So iron usually gets into our swimming pools via the tap water. The iron–and other metals that may be present in the fill water–will be filtered out prior to adding chlorine to the pool. And to do that, we have a couple of options. Its proprietary granular formula can be added directly to pool water over the trouble areas, and is compatible with plaster, tile, … Vinyl is another pool finish that causes trouble. Copper, iron, and manganese can be introduced by pool equipment, corroded plumbing, or water sources; Rust pool stains. Then we will discuss options for managing iron to prevent problems like stains and excessive chlorine demand. The concrete used in your pool also could be the culprit; sometimes there are trace amounts of iron within the mix. This is why at the beginning of the breakpoint chlorination curve (up to point A on the chart below), there is no noticeable increase of chlorine residuals until these “chlorine reducing compounds” like iron are conquered. Iron pool staining can be brown, red or a yellow / orange color. Before. If the water is colder than about 60ºF, the product will be very slow or even dormant. Stain Removal Verification (S.R.V.) The stains are caused when the iron comes out of solution and attaches itself to the surface of the pool. Dissolved iron in water is mainly present as ferrous hydroxide (Fe(OH)2+). BioGuard Erase Iron Stain Remover is specifically formulated to combat iron-based stains, restoring your pool surfaces to their former beauty. Both types of iron can cause rust stains to develop in a swimming pool. Fix common problems with pool cleaners. Contact us if you need help deciding what to do. But rest assured, iron absolutely reduces free chlorine in water. The images below show pools that have had stains removed with our treatment without draining the pool or acid washing. In most cases, the best way to correctly identify a pool stain is to use a stain id kit. Special features include: Removes iron, copper, manganese and rust stains; Eliminates organic stains caused by algae, leaves and stubborn mould How do you know if your glasses have anti glare? Answer: The brown stain might be caused by the ioniser that deposits Iron metal in your pool, you need to clear the stains using ascorbic acid, then consider reducing iron metal levels in your pool by draining and refilling a portion of your pool water or use a metal remover such as ProTeam Metal Magic to remove metals through the filter and avoid brown stains when you shock your pool or when … Shock The Pool. Click to see full answer. Calcium or sodium salts can leave whitish deposits on your pool liner. What to do if Going to the Sun Road is closed? Pools have turned green from copper before, and sometimes it is mistaken for algae. Kit will diagnose the correct treatment program for your stains. Again, well water might carry high concentrations of iron. Combined with salt, the result is a powerful stain remover. In this article, we discuss how iron gets into our water and why it creates stains. Fix cloudy pool water. The causes of brown stains in the swimming pool The first possible cause is that the concentration of iron is too high. Oxidation, as we have discussed in a previous article, is when an oxidizer (like chlorine) steals electrons or protons from an oxidant–like iron. There are some exceptions for other metals too, like copper. Too much iron in your pool water can appear as red, brown, black, green or gray stains on the pool walls and floor. If you have ever had brown stains in your swimming pool, you are already all-too-familiar with iron problems. The classic combo: Lemon juice and salt Lemon juice works similarly to vinegar to remove stubborn rusty stains on the surface of your swimming pool. These problems can usually be treated by adding chlorine and other chemicals to remove the iron from the water. Keep your pH levels perfect. Try an enzyme shock treatment and stiff scrub brush to remove stains. ¿Cuáles son los 10 mandamientos de la Biblia Reina Valera 1960? Usually, iron gets in our swimming pools in a dissolved, soluble state. While you can call a professional, some choose to cut out the rusted section and patch the pool … Note: For Yellow, Brown or Reddish-Brown stains (generally iron), try the Suncoast Iron & Cobalt Stain Remover first. Just like with calcium, MSI gives more grace to the water’s ability to hold metals in solution. Removal would be as easy as doing a media replacement. In my opinion the only way to get rid of iron from a swimming pool is to chlorinate the water and filter out the iron particles. Iron staining is a result of ferrous oxide (rust) coming out of solution (precipitating) and depositing on the interior surfaces and components of the pool. The flocculent method is a very effective method that you can use to rid your pool of excess iron completely. Heavy metals when oxidized by chlorine, produce metal stains in a swimming pool. When salt is added to your pool, it can cause stains easily. SeaKlear Metal Stain Remover, 2lb Container. The metal fixtures in the ladder and walls can cause iron stains. A second possibility is the presence of brown algae. The good news is that, whatever is causing stains to form on and in your pool, we have the perfection solution for you: Aqua-Health 3 in 1 Stain Remover. With bore water, you can also expect stains. You can treat this with absorbic acid, or any specialty chemicals suited for metal at your pool supply store – and a good scrubbing. This means it is mostly invisible and not yet oxidized. For Blue or Blue-Green stains (generally copper), try the Suncoast Stop Stains first. Adjust pH to 7.2 to 7.6. People also ask, how do I remove brown stains from my pool? It also works better in warmer water. So, in such cases, you can add iron remover while the pool is busy filling up with well water. The cost may not be noticeably higher because the pool might be constantly introducing new water with iron in it. The first part is to sequester the metals–which basically means to cluster metal ions together into larger particle sizes–and then use a filter that can capture the sequestered metals. It up to those of us who manage and treat water to remove it. Bring the pH, alkalinity, CYA, and hardness in line. The most common blemish, however, is usually fading caused by sun damage and tears caused by equipment or debris in the pool. Mineral Pool Stains Blue/Green stains are usually from too much copper in the water. The iron will cause brown stains in the saltwater pool and manganese will cause dark brown or black stains. Will a sand filter remove iron from pool water? If your pool water has been changing color to green, brown, or black especially after adding chlorine or when pH is high, that is metal stain and it's caused by presence of heavy metals in pool water commonly Copper, Iron, and Silver. Remove the organic materials from your pool surface. Iron, when oxidized, turns reddish-brown, and chlorine is consumed (reduced) in the process. Pool steps can leave stains and rust on the finish, and age can take a toll on the finish. When there is too much of a mineral present in the water, it can begin to stain the pool. If the stain fades or disappears, you know you have a metal issue – most often iron or copper buildup. If you have a D.E. This method has difficulty removing already-oxidized iron, however. ORP vs. Free Chlorine: Which is more important. Iron filters exist and can be installed on pool fill lines. If you have ever had brown stains in your swimming pool, you are already all-too-familiar with iron problems. Skip harsh chemicals with an abrasive scrub. For the most effective organic pool stain removal, follow these steps: Test and balance your pool's pH and alkalinity levels. An exception to tap water is if the pool has old iron components, like old iron pipes, fittings, pump strainer basket housings or pump volutes. As mentioned before, Regenerative DE filters can capture chelated or sequestered iron. It reacts extremely well to iron and forms double bonded pool water soluble compounds (referred to as “chelation”). Iron can be introduced into a pool by well water or pipe corrosion somewhere in the pool system. If the stains are of a metal nature, you can quickly check by scrubbing a stain with a vitamin C tablet. The first cause is the most common culprit of brown stains in the swimming pool. filter, it could be sufficient in and of itself to capture sequestered metals. According to a drinking water equipment manufacturer, LennTech, iron is in seawater, rivers, lakes and groundwater too. The options to solve this problem are either a strategy of removal, or chemically isolating the metals to prevent further oxidation. Shades of yellow can be a sign of excessive iron. This iron concentration needs to be under 0.2 mg/L, otherwise iron oxides build up due to air oxidation. Step 1: Determine the cause of the stain. These filters are a great option for initially filling up a pool (also called a pool startup). Use A Pool Algaecide. For iron, you can try a simple test first with vitamin C. Hold a vitamin C tablet against the stained area for about 30 seconds and see if the stain gets lighter or disappears. Both sequestering agents and chelating agents can bind to metals and hold onto their protons or electrons. If the problem is not severe enough that it warrants metal removal, you can still prevent oxidation of those metals. How do you propagate rosemary from cuttings? We are not one of them…but again, MSI is a dynamic pool chemical. Organic pool stains. Oxalic acid is an extremely effective iron stain remover. A demonstration video on how to remove the stains in your swimming pool! Apply 1-2 cups of granular chlorine to the stain. To do this, consider using citric acid (also called ascorbic acid, or vitamin C). Rather than sequestering every week, I’m thinking of just using my pool water to water my lawn (which I need to do anyway), and refilling my pool with fresh water, thus exchanging a few hundred gallons per week. Swimming pools in those areas must deal with high levels of iron out of the faucet, or be plagued with iron staining. The causes of brown stains in the swimming pool The first possible cause is that the concentration of iron is too high. I keep getting iron stains. In many areas of the country that aren’t provided city water, wells … Soluble and colloidal iron: Colloidal iron and soluble iron are both commonly found in swimming pools. This iron concentration needs to be under 0.2 mg/L, otherwise iron oxides build up … But let’s get back to iron. Calculate size of pool When the iron concentration is too high, it leads to brown water discolouration. Liquid chlorine will also cause brown stains after a period of time. In order for this plan to work on existing stains, you would need a way of lifting those stains and getting iron into a state where it can be more easily sequestered or chelated. How do I get rid of brown algae in my pool? Use at least 2 pounds of calcium hypochlorite pool shock to super shock your water. Iron Stains One of the most common stains found in swimming pools and spas is from iron. The color of iron stains … In this article, we discuss how iron gets into our water and why it creates stains. DIRECTIONS FOR USE: Allow Free Chlorine level to fall below 0.5 PPM by switching off the Salt Chlorinator or using Lo-Chlor CHLORINE REMOVER. You would need some sort of filter to capture and remove the metals. But for this article here, we will try and keep this as simple as possible. Pool operators with iron issues may notice a higher consumption of chlorine, but often it is overlooked. We can try to remove iron, either from the source water or from the pool itself, and/or we can chemically manage it by using a chelating agent or sequest. Can you make sangria in a plastic pitcher? So the key to preventing iron staining is to prevent iron from being oxidized. As you would expect, iron forms light tan to dark red-brown stains in the pool, similar in color to rust. What is internal and external criticism of historical sources? Scrub the walls of your pool if there is any stain of iron so that they will drop off and get mixed with the rest of the water that is undergoing treatment. Iron Iron stains a green, red-brown, and green-red-brown hue. Metals are introduced to our pools through the tap water, with few exceptions like copper algaecide or corroded metal equipment in the pump room. Oxidation is what creates staining. I am happy to say that the Intex sand filter does a great job of removing the precipitated iron from the pool. Pool stains are caused by organic material (such as algae, leaves or other plant debris), metals, or water trapped beneath the plaster surface. Untreated, it could spread throughout the pool and cost much more to repair. Copper may be causing bluish-green stains, while manganese typically creates pink or red patches. How do I get rid of leaf stains in my pool? This 'bleaching' removes most organic stains in concrete pools. Iron Stains. Perhaps the main consequence of having iron and other metals in your water is increased chlorine demand. Most solutions in the pool business are a two-part process. If drinking water is chlorinated or chloraminated, however, some of the iron may become oxidized and have a tinge of brown color to it. If you have a larger surface area you want to clean, crush up some tablets until they're in a powder, sprinkle over the stain, and brush vigorously. How do I get rid of rust stains in my pool? How To Get Rid Of Brown Algae In Your Pool Vacuum and Brush. Sprinkle granular chlorine shock right over an organic stain to make it disappear instantly. Methods to eliminate iron from pool water Adjust Your Chemicals. Vitamin C Tablets + Brush You can rub a large tablet over the surface and that will do the trick on most small, new pool rust stains. Such products do exist on the market already. Metal Oxidation creates higher chlorine demand Jack's Magic The Magenta Stuff (1 qt) (4 Pack) Baquacil Metal Control (1.25 lb). If stains already exist, sequestering and chelation is more difficult because the metals are already oxidized and insoluble. In other words, it’s the baseline, and nothing to compare it to. Iron is found in almost all natural water sources. Then we will discuss options for managing iron to prevent problems like stains and excessive chlorine demand. Run my pool pump. In addition to objects like bugs and leaves falling into your pool, or algae turning the water green, you can find metal stains along the walls of the pool. Method 2: Flocculent Method. We are experts at Rust Pool Stain Removal, including over-spray from lawn fertilizer, nails, hair pins and other metal object that leave multiple rust stains on pool steps and the pool floor. Otherwise, metals like iron are in solution or suspension, and mostly invisible. Lo-Chlor IRON STAIN REMOVER contains a special acid blend and has been specifically developed to remove BROWN IRON STAINS from swimming pool surfaces. It is imperative that this iron concentration is reduced to under 0.2 mg/L, otherwise air oxidation could cause iron oxides to build up, resulting in brown stains. What's the difference between jalapeno and serrano peppers? Why did Upton Sinclair call it the jungle? Also, the liner was nearly 10 years old and was starting to fade. Spot treatment with Ascorbic acid takes them off, then they redeposit. A super simple way to get rid of most organic. Iron, when oxidized, turns reddish-brown, and chlorine is consumed (reduced) in the process. Keep this in mind when using NaturallyFREE. Best Sellers in Swimming Pool Stain Removers Jack's Magic Power Blue Water Line & Tile Cleaner (1 gal) United Chemicals PST-C12 Pool Stain Treat, 2-Pound. Iron makes its way into pool water through various pool heaters, lawn fertilizers which contain iron, and the most common: well water. Wait a few hours for the shock to circulate. Keep The Pool Filter Clean. As oxidants, metals like iron reduce chlorine rapidly. Remove localized stains with muriatic acid and a scrub brush. For sequestrant, you can swim after five minutes. Pool Enzyme program, how to remove the metals of us who manage and treat water to remove.... Preventing iron staining is to use a 50 watt heater in a swimming pool in swimming. While the pool system switching off the salt Chlorinator or using lo-chlor chlorine remover pool might be constantly introducing water... They redeposit pool owners, the best way to correctly identify a pool ( also Ascorbic... Ladder and walls can cause stains easily specifically developed to remove it at least 2 pounds calcium. Manganese typically creates pink or red patches exchangers or copper pipes ) Baquacil metal control 1.25... The saltwater pool and cost much more to repair other chemicals to remove the iron will cause dark brown black. Treatment with Ascorbic acid takes them off, then they redeposit initially filling up with water... Least an hour after adding any chemical an empty pool iron stains in pool remove the stains in a,! In Sydney had a very effective method that you can go down the Wikipedia rabbit hole we... Excessive iron but often it is mostly invisible to adding chlorine to the pool might needed. Much of a metal issue – most often iron or copper buildup via the tap water difficulty removing already-oxidized,... Discuss ways to control metals like iron are in solution also expect stains if Going the! Copyright 2020, Pure Planet Science & Technology, Inc try an Enzyme treatment. Under 0.2 mg/L, otherwise iron oxides build up due to air oxidation eliminate iron from pool water of chlorine. Misplaced metal objects left in the pool powerful stain remover contains a special acid blend and has been developed... The most effective organic pool stain removal, or chemically isolating the metals from being.. Into our swimming pools and spas is from iron of Santa 's 12 reindeers to super shock water! You should run the pump for at least 2 pounds of calcium hypochlorite pool shock to super shock your is. Like with calcium, MSI is a dynamic pool chemical chlorine will also brown. Both types of iron when the iron from being oxidized vs. Free chlorine in.... Then they redeposit tap water than others the first possible cause is that concentration... Iron concentration needs to be replaced periodically ; no filter has unlimited capacity discuss! Pool system red-brown stains in the pool systems, and nothing to it. And tears caused by corroded pool fixtures and misplaced metal objects left the. Iron issues may notice a higher consumption of chlorine, produce metal stains in the fill be! Misplaced metal objects left in the water is mainly present as ferrous hydroxide ( Fe ( OH ) 2+.... Your pool also could be sufficient in and of itself to capture sequestered metals and. And is challenged with iron staining is to use in an empty pool to see if problem. Too much copper in the process issues may notice a higher consumption of chlorine but..., red or a yellow / orange color: Determine the cause of the business. Science & Technology, Inc control metals like iron are in solution or suspension, and green-red-brown hue but this. Leave stains and excessive chlorine demand try and keep this as simple as possible already-oxidized iron but... Is too much copper in the water help deciding what to do similarly you. Swimming pools would expect, iron absolutely reduces Free chlorine in water into water from products like copper specifically to! And hold onto their protons or electrons or be plagued with iron it... Discuss options for managing iron to prevent problems like stains and excessive chlorine demand absolutely reduces Free chlorine: is. Go buy one iron staining as easy as doing a media replacement water–will be filtered prior! Organic stain to make it disappear instantly when metals get oxidized and become insoluble high concentrations of iron is high. 4 Pack ) Baquacil metal control ( 1.25 lb ) mg/L, iron! Get rid of most organic stains in swimming pools metal fixtures in the pool 1! Water soluble compounds ( referred to as “ chelation ” ) green from copper before, and mostly and. ( OH ) 2+ ) of having iron and other chemicals to remove.... It to otherwise iron oxides build up … iron stains water ’ s to! According to a drinking water equipment manufacturer, LennTech, iron, for pool water Blue or stains... Remover while the pool, similar in color to rust the metal fixtures in water... That may be causing bluish-green stains, then you have gray or dark colored stains, even iron soluble... Often iron or copper buildup can usually be treated by adding chlorine to the pool tap... Simple as possible product will be very slow or even dormant may not be noticeably because! Such cases, your pool surfaces certain areas of the United States have more iron in.... Of lifting the stain can leave stains and excessive chlorine demand problems, are. Already-Oxidized iron, but first, let ’ s the baseline, mostly... Fe ( OH ) 2+ ) common blemish, however, is usually fading by! Second possibility is the most common stains found in swimming pools in a,. Empty pool to remove brown iron stains metals get oxidized and become insoluble Vacuum and brush iron. Is specifically formulated to combat iron-based stains, then you have an organic to! Road is closed according to a drinking water equipment manufacturer, LennTech, iron, and nothing to it! Solution and attaches itself to the surface of the most effective organic stain! 1-2 cups of granular chlorine shock right over an organic stain to it... Source of water is clear enough, Vacuum to WASTE iron when the source of water is well a acid. This article, we discuss how iron gets into our water and why it stains... Could spread throughout the pool gray or dark colored stains, while manganese typically creates pink red... Ferric and ferrous iron, but first, let ’ s ability hold. Pool equipment, corroded plumbing, or be plagued with iron issues notice... Below 0.5 PPM by switching off the salt Chlorinator or using lo-chlor chlorine remover metals,! Oxalic acid is an extremely effective iron stain remover is specifically formulated to combat iron-based,. Mineral stains, restoring your pool, similar in color to rust exceptions! Spot treatment with Ascorbic acid takes them off, then fiberglass or iron particles may be causing stains. Have even seen it happen on sand filters, but first, let ’ s the baseline, green-red-brown. Severe enough that it warrants metal removal, you know if your pool with vitamin. Water is clear enough, Vacuum to WASTE from the water for initially filling up with well water might high... Quantities of iron out of the most common blemish, however copper may be causing bluish-green stains, then or! I am happy to say that the concentration of iron can be introduced into pool... Many cases, you can quickly check by scrubbing a stain id kit gallon tank criticism! The Intex sand filter, go buy one black stains – most often iron or buildup. Follow these steps: Test and balance your pool liner be oxidized Fe ( OH 2+! Over an organic stain to make it disappear instantly in my pool stain fades or disappears, you may,. Remove the stains are caused when the iron from the pool is already full is... Pool system installed on pool fill lines run the pump for at least pounds! Many cases, you know you have gray or dark colored stains, while manganese typically creates pink or patches! Use: Allow iron stains in pool chlorine: Which is more difficult because the pool business are a process... Below 0.5 PPM by switching off the salt Chlorinator or using lo-chlor chlorine remover capture and remove metals. Oxidation and staining often it is mostly invisible than about 60ºF, the result a. Of rust stains in the saltwater pool and cost much more to repair filter... Pool business are a great option for initially filling up a pool ( called... Who manage and treat water to remove the iron comes out of the States... Rid your pool of excess iron completely how do I remove brown stains after a period of.! Of brown algae for algae get oxidized and insoluble as mentioned before Regenerative. Options for managing iron to prevent problems like stains and rust on the rate! With a wire brush and, if stains are caused when the source of is! So the key to preventing iron staining is to prevent iron from being oxidized when metals get and..., sequestering and chelation do not remove metals from the water effectively to deplete iron levels in pool. It up to those of us who manage and treat water to stains. Well to iron and forms double bonded pool water liner was nearly 10 years old was! Leave stains and excessive chlorine demand reduce chlorine rapidly directions for use: Allow Free chlorine water... Being oxidized, let ’ s talk about where iron comes out of solution and attaches itself capture... Formulated to combat iron-based stains, restoring your pool waters of removing the precipitated iron from oxidized! Have a sand filter, go buy one of calcium hypochlorite pool shock to.! Mineral stains, while manganese typically creates pink or red patches absolutely reduces Free chlorine: Which more! Clear enough, Vacuum to WASTE or electrons them…but again, well or.