Thanks for the info.

I thought the trichlor tablets had a stabilizer in them.

I did get a chlorine reading, and now it's at or above 3 (my kit only goes to 3), so I'm trying to play around with the dial setting on my in-line chlorinator. (Does the dial really work to reduce or increase chlorine in the pool?)

My total alk is high, it started at about 320 and now I've got it to 250. I'm adding a gallon of acid per day to lower it. I assume I shouldn't add 3 gallons of acid all at once to lower it drastically, right?

My pH is good, about 7.8.

Should I test the water at the same time everyday?
Does it matter if I test at 6am or 6pm?
Should I test right before or right after adding chemicals?