I've been fighting my pool for a year now. All last season and this season.
Can't get it to clear up for one, chemicals and levels are all correct accoding to pool store. They even recommended that I change about 100 pounds of my sand out. Well i just noticed something very intresting while vacumming up all the green alge and dirt off the bottom. it's blowing right back into the pool. I back washed before I started vacuming, and not even 5 minutes later, green scum coming out of the return. Can't put my finger on it. i took apart the head and the spider gasket is still good and seated where it supposed to be. I think my pump is going out too, seems like flow is a lot lower than it use to be. Any idea's why it would not be filtering like it should. Besided a week pump. I'm wondering if i just need to buy a whole new filter system. i know I need a new pump at least.
24' abovoe ground using chlorine. Typical Hayward sand filter and Dayton (grainger) pool pump.