How To Remove Pool Stains? Even if you regularly clean your pool and balance your water, you might still end up with pool stains.
The key to removing and preventing pool stains is knowing what caused them in the first place.
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It’s a totally free easy to use guide to help you keep track of taking care of your pool.
Okay, so what causes pool stains?
Before you go out and buy a pool stain remover, you need to determine what stained your pool.
The most common pool stains fall into two categories.
One is organic stains.
These are leaves, berries, and other organic debris that can cause stains if they settle and are left there for some time on your pool surfaces.
And number two are metal stains.
Metals like copper and iron can enter your pool water through things like well water or a corroded pipe.
The best way to figure out what type of stain you have is by the stain’s color.
Greenish brown stains are likely organic stains caused by leaves or plant matter.
Reddish blue stains are likely from brightly colored berries from a nearby tree or bush.
Bluish greenish-black stains could be caused by organic matter like leaves or berries.
But if there’s nothing like that around your pool, it’s probably copper, either from well water or a corroded pipe.
Greenish brownish-red stains mean there’s more iron in the water from either well water or a nearby source like a fence.
If the iron rust and the rust flows into your pool, say after it rains, it can stain.
Brownish blackish-purple stains are caused by manganese.
This is found in well water, but can also be found in some municipal water supplies.
So you’ve got a good idea of what caused the stain.
It’s time to test your theory and confirm the source.
Now, if you think it’s an organic stain, apply a small amount of chlorine directly to the stain.
And this should go away easily if it’s organic.
If you think it’s a metal stain, chlorine has little effect.
Instead, apply some ascorbic acid, AKA vitamin C, directly to the stain.
If the stain is removed or lightened by the powder, it’s a metal stain.
Now that you’ve identified the type of pool stain, it’s time to remove it.
First, here’s how to get rid of organic pool stains.
You’ll need to super chlorinate the water.
To do that, you’ll use pool shock.
First, you wanna test and balance the water.
Use test strips or a liquid test kit to test and balance your alkalinity and pH.
Your alkalinity should be between 100 and 150 parts per million with 125 parts per million being ideal.
And your pH should be between 7.4 and 7.6, with 7.5 being ideal.
If you need help balancing your water chemistry, be sure to check out our other articles.
Two, you wanna shock the pool.
If it’s a small stain, a regular dose of shock should work.
But if you have multiple or larger stains, use a triple dose of shock.
This means adding three pounds of calcium hypochlorite shock for every 10,000 gallons of water.
Now, remember to always shock your pool at dusk or nighttime so the sun doesn’t burn away the shock.
Three, after you’ve added shock, brush your pool.
Use a stiff pool brush to thoroughly scrub the stains.
And it’s okay if you don’t remove them completely at this point.
Four, you wanna run the pump.
Allow the shock to circulate through the pool for at least eight hours or overnight.
Five, you wanna brush the pool again.
During those eight hours while the shock is circulating or the next day, scrub the stains again.
And six, check the stains.
If they’re gone, great.
If not, repeat the process of shocking your pool.
Now, here’s how to get rid of metal pool stains.
Metal stains can be a little bit more difficult to get rid of, but it’s not impossible.
First, you wanna test the water for metals.
Knowing what kind of metal stained your pool, will help you buy the right type of pool stain remover.
Some home test kits will test for metals, but your best bet is to take your water sample to a local pool store.
Next, you wanna buy a metal pool stain remover.
Look for one that targets the type of metal that stained your pool.
And then three, follow the instructions.
Each pool stain remover will work a little differently.
It’s usually helpful to have a pool brush on hand to distribute the stain remover.
Now, how do you prevent pool stains from happening in the first place?
When it comes to preventing organic pool stains, it’s all about keeping organic contaminants from settling in your pool.
First, you wanna keep your water balanced, especially the alkalinity, pH, and sanitizer levels.
Two, keep the pool clean by using a robotic pool cleaner or regularly vacuuming your pool.
Three, skim the pool surface often to keep leaves, twigs, and other organic debris from sinking to the bottom.
Four, you wanna move plants with fruit and berries away from the pool area.
And five, check the pool regularly for stains and remove them while they’re still small.
Finally, here’s how to prevent metal pool stains.
First, you wanna test your water source for metals.
If they’re present, use a hose filter whenever you fill or refill your pool.
Two, use a metal sequestrant in your pool.
This chemical binds with the metal particles to keep them from settling on pool surfaces.
And it means that metal particles can be removed by the pool filter.
Now keep in mind, a metal sequestrant is not a metal pool stain remover.
It can prevent stains, but it will not remove them.
Three, maintain your pool plumbing.
If your parts use copper pipes, check them regularly for corrosion.
And four, keep your pH levels steady.
This is especially important if you have copper in your water.
A low pH level will make the water acidic.
Acidic water corrodes and oxidizes copper, which will stain your pool.
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