Janet,

Here are the vitals on the Pool:

Volume: 24,000 gals
Liner: Vinyl
Pump:3/4 hp Centurion
Filter: Pentair FNS-48 (120 sq ft area)

I have been using 6% bleach, baking soda, borax, and muriatic acid to adjust ph. I have not needed much of anything besides the bleach (about 3 quarts per day) for about 6 weeks since my salt cell died. I do not have a test kit yet, but I use 2 pool stores that use the drop based method.

My levels from yesterday are:

FAC: 3 PPM
TAC: 3 PPM
CYA: 99 PPM
TA: 90 PPM
pH: 7.8

I have had no troubles with the pool all summer. We have not had any rain for over a month now and maintenance has been easy. I have about 8 lbs. of lithochlor shock (29% lithium hyperchlorite) I would like to use if possible but if that can cause problems I have plenty of bleach on hand.

I am also not sure if I actually have algae now either. There is a brown stain on the bottom right along the seam where the slope for the deep end starts. It is about 4 to 6 inches wide. It is not even visible when the sun is shining on it. You can only see it when the sun is setting and you cannot brush it off. I do not have much experience with algae. I have only seen it once in the 6 years we have owned the house.

I hope this answers your questions. Thanks for helping me.

Paul