I put in the dry acid because my TA was high. And for clarification, the pool store test was done a week or so before I tested. The end of July we were away for 4 days. Water looked good except for being cloudy. We had a solar cover on and put 5 pucks (trichloro-s-triazinetrione) in the dispenser. Husband said it looked fine right after we got back, but in a day or two it was definitely green. Then I took it to be tested at the store. Yes, we've been using trichloro granules.