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Howdy Gang, I am removing a 16+ year old Pentair FNS 60 DE filter from our pool. She just won't quit leaking, even with new a new band, o-rings, etc. I'm guessing somehow time in the hot Texas sun has caused the fiberglass case halves to be somewhat out of round with each other (happens to a...

Re: Difference Between These Grid Sets? Split from http://www.troublefreepool.com/threads/68436-Difference-Between-These-Grid-Sets Butterfly I have a similar filter grid replacement question along those same lines. I have a ~15 year old Pentair FNS 60 DE filter. Grids have lasted all this...

Some eye popping claims in this research paper on Florida pools from 1984...such as...3-4 hours per day is more than adequate for chemical distribution; it isn't necessary to "turnover" a pool's volume (even once) in a day; >2 hours pump runtime results in imperceptible improvement in water...