I have the opportunity of buying a Pentair FNS 60 SQ FT DE filter for a real good price. My question, is that too big of a filter for my pool? Not really sure how many gallons it is but its a free form 18x36, 3ft shallow, 8ft deep end. I keep getting different numbers, from 15,000 to 22,000 gallon pool. I have a 1.5 HP pump right now, with a SF of 1.3.
I was originally going to buy a new 36 SQ FT and then after asking on a thread, was informed that a 48 SQ FT filter would be better. I now found this deal on the 60 SQ FT, but is that overkill?