Grey pool plaster repair7/1/2023 ![]() ![]() If the stain lightens or comes off with this application, you can bet it was caused by metals. If you think that your pool stain has a metallic culprit, simply apply some ascorbic acid powder directly to the stain. Sorry to burst your bubble, but unfortunately, chlorine has little to no effect on metal stains at all.įor this type of staining, we need to call upon another weapon in the pool care arsenal: ascorbic acid (or vitamin C). You may think that the cleaning power of chlorine knows no bounds and tossing it onto every stain will do the trick. If the stain is truly organic, it should dissipate quickly and without fanfare. Simply apply a bit of granular chlorine directly to the stain to see how it reacts. To find out if your pool stain is organic, the test is easy. Let’s take a look at how to test for each. Just as there are different kinds of pool stains with their own nefarious causes, so too are there different tests to determine the causes. Only when you’ve confirmed the cause can you move on to treating (and preventing) those unsightly pool stains. Now, armed with the possible causes of your multi-colored pool stains, you can move on to the next step of testing your theories. Manganese is typically found in high levels in well water but is also in municipal water, depending on where you live. Whenever you see purple staining in the water, other than berries, the most likely cause is a surplus of manganese in the water supply. Brown and/or Purple StainsĪ purplish stain you say? Well, that one is much easier to figure out. Take a look around for any rusted metal, such as a fence, ladder, or other pool equipment that may be rusting to find the culprit. When on the hunt for the cause of pool stains, a reddish color, perhaps mixed with brown or green, is usually evidence of an excess of iron in the pool. Copper staining can be caused either by too much copper in your water source (well water, etc.) or it can be a result of corroded copper piping in your pool’s plumbing. If you’ve determined that organic matter is not to blame, this kind of discoloration is most likely due to an overabundance of copper in your pool water. Leaves, dirt, or other plant matter can leave greenish-brown stains when left to decompose in the pool for too long. This color stain can be attributed to organic debris decomposing in your pool. If you have any berry trees or bushes near the pool, trim them back and make sure to clear all of the berry debris out of your pool water. Normally, the cause of this discoloration in your pool is berries. Once you determine the primary colors of the stain, you can figure out how to fix the problem. The first step is to take a closer look and see if you can make out the colors of the stain. If you gaze into your pool and notice a stain at the bottom or along the sidewall, don’t panic. Identify the Color(s) to Identify the Stain Now that you know the causes, let’s investigate a bit further by looking at the color(s) of the stain, which will also tell you the source of the stain. Organic stains are a bit easier to track down because you’ll probably notice the actual leaves, dirt, or berries lurking at the bottom of your pool too. ![]() These include things like leaves, dirt, berries, algae, oils, and other plant matter. The other possible explanation for your mysterious pool stains is an organic culprit. If any of your pool equipment is old and has started to rust, chances are you’ll see evidence in the form of staining. ![]() Perhaps some of your pipes have corroded and are sloughing off into your pool water. ![]() The next is your metallic pool equipment. If you use well water or if your local water source has lots of metals dissolved it in, the metals can come out of solution and form stains on the bottom or sides of the pool. Your water source is the first place to look. There are several reasons why you might find metal staining in your pool. The two main reasons for pool stains can be traced back to either metal or organic origins. Once you know that, you can grab the right stuff to clean it correctly. In order to properly manage and remove a mysterious pool stain, you first have to know what caused it.
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