Hi all,

Hoping for some help with my above ground chlorine pool. (24' diameter with Hayward E-Series E100 sand filter)
I purchased a home that came with a pool and in the summer the water was Crystal clear. Opened the pool and it was infested with algae. Added four 128 oz gallons of shock and one gallon of algae gone. Over night the pool turned blue gray color. Backwashed the filter for five minutes and rinsed for one minute. I then ran the filter for 48 hours and the water is turning a blueish green and there seems to be alot of white floating particles in the pool. I noticed the return jet pressure decreases until I backwash the filter for 30 seconds than the pressure builds up again. Any idea what could be going on? Thanks for the help in advance.