Algea stains

[markR]

I had a large bool now gone. Left black stains on steps and bottom of my inground pool.

I tried ascorbic acid but bot work well- probably had too much chlorine in water and insufficient ascorbic acid. Loks like ascorbic acid is for metals anyway.

Can anyone help with advice on what to use- short of empty and acid wash- to fremove algae stains?

Thanks

Mark

 

[JasonLion]

Algae normally leaves organic stains. If you keep FC up towards the high end of the normal range, organic stains will fade out over a week or two.

 

[markR]

Thanks.

Aside from increasing chlorine anyone know of another way to quickly get rid of algae stain after bloom?

 

[linen]

Welcome to tfp, markR

If you have stains that are actually organic, then the approach JasonLion mentioned of raising your chlorine level to the high end of normal is the best answer...cheap and effective.

Try could this to confirm, place a trichlor tablet on the stain to see if it lightens. If it does then the stain is organic and raising the chlorine level is the right approach to get rid of the rest of the stain/stains.