I am planning to replace my sand filter. Pool & Spa Depot installed what I guess is their house brand 300# filter with top mounted valve and 1.5 HP single speed pump and it has never done a good job, especially after the first year (it's about 5 years old now). I've tried new sand but I still get a large amount of dirt getting through the filter.
My question is about the size. I would like to spend as little as possible just like most people, but I don't want any regrets. My pool is about 27,500 gal so it looks like the 24" Hayward is large enough, but should I go larger? Hayward also has a 27" with top mount valve (current filter is also top mount) for just a few bucks more.
Any advice is appreciated.