One more thought about filter running time. Correct me if I am wrong but this is what I was told. If you have any water clarity or algae proplems run your filter 24/7 until your problem is gone.

Aside from that, 10 - 16 hours a day seems the norm, two cycles being the best. Increase and decrease running time with daytime temperature. When it gets over 110 here in Az. the filters need to run a little longer.

Later, Dennis