All filter types like DE Filters, Sand Filters, and Cartridge filters are great for all water filtration. To decide which is best for your pool you will want to look at two factors: ease of maintenance and filtration capabilities. The easiest to maintain will be a cartridge filter. These will provide the middle filtration level and can provide filtration down to 5 microns. The best filtration comes from a DE Filter (diatomaceous earth) with a filtration system of 1-6 microns, but can be a little more difficult to maintain.