1. Add borax, a box at a time, till your pH is above 7.0. Allow 1 at least hour of pump ON time, before retesting pH. Add it slowly, to the skimmer, with the pump running.

2. For now, add 1 gallon dose of bleach each evening, directly to the skimmer, but NOT on top of any tabs. (Make sure bleach and tabs NEVER touch!)

3. What is your stabilizer level? If your CYA (stabilizer) is low, chlorine will NOT last through out a day of full sun, no matter how much you add. Instead, if you have swimmers during the day and have low CYA, pour 1/8 to 1/4 gallon doses into the skimmer periodically. This is in ADDITION to your evening gallon. I'd recommend getting a cheap OTO/phenol red kit, for quick testing during the day: add chlorine if you have swimmers and the OTO results aren't medium yellow or darker; skip doses of chlorine test result IS dark yellow.