The pool has been crystal clear up until yesterday when I saw the very start of algae growth. We have had very hot and sunny weather, no rain for days. Ibackwashed the DE filter, added new DE, pressure good. during the day I added 5lbs of PH up, 5lbs of Alk up and lastly in the evening shocked the pool with Leslies Calcium Hypoclorite. This am the pool is very cloudy; can't see the bottom. PH is 7.2, Alk 80+, and clorine is high 5+ beyond my scale. What have I done and how do I fix it? Thanx for all your help.