need new filter.any suggestion

[RavenNS]

I have read on this forum that big filters are the way to go

consider putting zeobrite in it instead of sand

[tenax]

i would suggest a 200 lb. i have a pool that's 18 x 30 so pretty close to the size of yours and the 200 lb size works great for me. re: the zeobrite, if you go that route, you'd need 100 lb (it's half the weight of sand for same capacity) and filters smaller particles than sand.