Sand filters strain the water from the surface of your skimmer box, filtering out impurities. These impurities eventually clog up the sand, which should be cleared every 6-8 weeks using a process called backwashing. Backwashing is greatly reduced if the sand is replaced with Zodiac Crystals (glass).
Zodiac cartridge filters use less water and filter finer particles than sand filters. Cartridge filters also require less water flow and less energy to effectively filter your pool water.
Ideal for tight spaces, they are simple to operate and maintain, and only need to be cleaned once or twice a season.