Thanks for the replies.

On the "move the needle" comment - no, I'm not using a meter, just meant it as the expression. I added about 1.5 pounds of Borax this morning and I'm now at 7.5 pH. I was trying to get it up to 7.5 or greater, per Ben's sticky on this subject, but I'm not sure why, because I thought Chlorine was more effective at lower pH.

Last night I lost about 2.5 ppm of FC overnite. Water is still cloudy. I put in another 1.44 gal 6% bottle this morning, and I guess I'll just keep maintaining my Cl above 10 ppm. I don't know what else to do.

I'm up to 66 gallons of 6% Cl used since I opened the pool 13 days ago. I've bought so much Chlorine at Costco in the last 2 weeks that I'm worried Homeland Security might start an investigation.

Any other thoughts?