I added a gallon of bleach last night to make sure the Cl level stayed high. This morning I tested at 6:30 am. My Cl was at 12 so I added 2 more gallons of bleach hoping to keep the Cl up. My pH was 8.0, and the chart on my Mark IV Test Kit reads that I need to add 6 1/4 pints of Muratic Acid. From what I've read on this site I should focus on the Cl first and get it under control first. I'll buy more Muratic Acid at the pool store today but I'm not sure on when I should add it; I did read that I should add no more than 1 pint per 10,000 gallons in one day. My Alkalinity was 240.

Also I read on Ben's post that most kits with my order # should ship Monday. I'll feel a lot more confident then.

I'll retest my Cl level at 7:30 am, take the fresh water sample to the pool store and post my results when I return. I'm assuming ALL I should need at the pool store is Muratic Acid and possibly the metal sequesterant.

Robin N
25,000 gallon pool with vinyl liner