My current DE filter has a crack on the lower tank section. I'm going to replace with a cartridge based filter. I was given a quote for a Pentair 300 sq ft unit for $750'ish. I believe that filter is oversized for my pool. Here's my pool specs-
17K gallons in ground (I measured it with the water meter when I last filled my pool)
2 speed pentair pump model 1136
bottom drain with a skimmer that are connected. I have to put a plate in to have it suck from the drain
current pump and filter are less than 10 feet from intake
My estimates say that I should use a 100 to 150 sq foot cartridge filter.
Can someone sanity check this situation please!