Susan,

Running your filter and some vacuuming to clean your pool and using bleach for chlorination should keep your pool sparkling all Summer. Up your run time on your filter and keep a closer eye on managing your water (posting a set of test results would be VERY helpful) rather than chasing your issue with other additives.

You are consuming a little extra bleach. (possibly from organics or just the sun....can't tell without test results) Try bringing your CYA to 30-40 and adding your bleach in the evening when practical....you'll get better efficiency.