Pool stains are one of the greatest mysteries for pool owners. They just show up on your backyard pool and you’re suddenly puzzled on how to remove them from the pool surface. Keep calm because we have collated these common pool stain problems that most pool owners have to face and how you can treat them.
The most common form of pool stains are blue-green stain on pool surfaces or in water. These are most likely from copper from algaecides, heat exchangers, fill water or older copper plumbing. It can be treated with Granular treatments, such as citric acid and ascorbic acid used directly on the stain. Generally, non-phosphate treatments are only effective on stains that have not yet set into the surface. However, if water is blue-green and also cloudy, this is more likely caused by algae and an algaecide is needed to treat it.
Another form of stain is found on pool water surface and tile lines, skimmers and pool cleaner which would look like purple precipitate. This is most likely caused by copper cyanurate when the cyanuric acid level is over 100 ppm. The cyanuric acid level should be reduced to about 50 ppm by draining water.
Brown stains on pool surfaces or in water are most commonly caused by well water that contains dissolved iron or manganese. It could also come from pool heater headers or lawn fertilizers. A non-phosphate sequestering agent can treat this.
Finally, the most shocking stain would be metal corrosions. Salt generators corrode metals, such as pool ladders and light rings causing these stains. You may add a sacrificial anode, such as zinc or use a non-phosphate sequestering agent to treat this.
At the end of the day you must consider that pool stains differ from one another so it’s crucial to examine the stain first before taking any action. In any of these situations, it would be safest to contact Pump & Pool People, an established and reputable pool service company, to run tests on your pool and clean it for you.