Hi - I have to add chlorine everyday just to maintain at least 2.0 FC - which seems too frequent. I use mostly liquid chlorine but sometimes use powder without CYA. Background: CYA is high (90) but I am managing that down, pH is 7.7, TA: 100, phosphates are low (<100). Temp is high 80s and I use a solar cover which covers the pool all of the time except when swimming. Pool is 17000 gallons but has no deep end - average depth is about 4 - 4.5 ft. If I do not keep chlorine over at least 2.0 I start to get mustard colored algae growth in some areas. Higher chlorine levels keep that from coming back. When the pool is cold in the winter I only need to chlorinate once per week if that, but in the summer it's a daily function to avoid algae growth - is this normal?