Iron stains

Stains on the pool surfaces, pool equipment
or on the swimmers, or off-color swimming pool
water. Discolored but clear pool water.
Pool Enthusiast
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Iron stains

Postby tacoma5050 » Wed 23 Apr, 2008 19:30

I will be using ascorbic acid to remove iron stains from my vinyl liner. I just opened my pool and I'm sure my chlorine is at zero as I have not added any since last fall. All I have done so far is turned on my pump, vacumed and added 25oz of polyquat-60 I have not tested any levels yet. The water is clear.

Before I add the ascorbic acid should I get my ph and alkalinity within a certain range? If yes, what levels?


chem geek
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Postby chem geek » Wed 23 Apr, 2008 22:43

Read this sticky. As for the pH and TA levels, you can have the pH be somewhat lower since that will help keep the stains from redepositing. Just making sure it's around 7.4 or 7.5 should be fine. The ascorbic acid will lower it a bit below that. Don't worry about the TA (assuming it's in a normal range -- it shouldn't be really low, say below 60, or else the ascorbic acid may lower the pH too much).

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