For water quality management, AQUASTRONG's sand filter systems range from 12 to 26 inches, making them ideal for nearly all ...

The filter is simply a few layers of coarse sediment (usually sand and gravel) constructed at grade, and surround with earthen banks. At first, the water pools on top of the filter material, held in ...

who described the most common types of pool filters DE, sand, and cartridge and the pros and cons of each. DE stands for ...