Quote Originally Posted by mbar View Post
You may have algae, because you need a minimum of 8ppms of chlorine in your pool at all times when you have a cya of 100 in order to have a really sanitized pool.
Now I understand why I keep having algae problems.... I haven't been accounting for CYA levels when adjusting my chlorine. Duh!


Use a cup and go around the perimeter of the pool and drop it down the sides as you go.
I crushed about a dozen vitamin C tablets yesterday, put it in a sock, and rubbed it on the steps.... voila no more stain. So I want to try the ascorbic acid treatment. I have one question though....

Do I take a cup of the ascorbic acid and pour it in at the edge of the pool all the way around my pool and let it sink/disolve? I have a 20' x 40' vinyl IG, 30000 gal pool. That would be a perimeter of about 120'. Over what distance, should I distribute the cup of ascorbic acid? Or am I getting too geeking here...? How much do you think I would need? For the whole pool. I have look at some of the stuff to put on steps at the pool store but it seems very expensive ... I would need two bottles of StainStuff mentioned above and that would be around $60.