So my 300lb sand filter split down the side. When questioning various pool companies about a replacement, I am getting a wide variety of sizes being recommended. I think I am going to switch to a cartridge filter due to having to use so much hose to properly backwash because of the design of my property. When talking to several pool companies, I am getting most recommending a 420 or 520 Pentair. The 520 seems huge - do I need that large of a filter.
I have an in ground saltwater pool that is approx 18000 gal. My pump is 1hp.
I must make a decision very soon. Any advice is greatly appreciated.