I just fired the pool guy since I had my boss over this weekend and the pool was green. Water was not clear, and I have green algae growing on the sides. I have a Hayward 2 HP pool pump. The pump is running 10 hours a day now. I think the pool is about 40K gallons (the pool is 16' X 32' and 6 feet deep in the middle, that is the deepest part). I have a Hayward cartridge filter (model c17502). I will go out to the pool store to get the water tested and then post again. I will order a test kit immediately. It is NOT a salt water pool, (thinking of going that way). It is not vinyl, so I believe it is gunite (dont know what other materials there are). The pool store keeps telling me to put Phosfree in the pool, but after reading about here thats probably not the best idea.

Hopefully with some help I can get it clear and keep it that way.