Cartridge filter sizing help

[kpu1012]

Hi all. I have been lurking here for a while and really appreciate all the great information. I was hoping I could get some advice on filter sizing for my new IG pool. It is a 20x41 "mountain pond" at about 25,000 gallons. Since I will be using a SWG I decided to go with a cartridge filter. My builder does not have a lot of experience with these filters and I want to make sure I get the right size. I believe that he mostly use Hayward products. Can someone please recommend the right filter size for this pool?

Thanks for your help in advance. I will certainly be posting pics of the new build

Mike

 

[mas985]

I have a 420 sq-ft on a 20,000 gallon pool but in general, bigger is better and means more time between cleaning which is only 1-2 times per year for me.

 

[Bama Rambler]

I agree with Mark, a 400+ ft² would be where to start.