Buy Pool Filter -
Pool Filter Sizing - How to Choose the Right Size - Leslie's Pool Supplies
Sand (~3.0 sq ft), Cartridge (100–200 sq ft), DE (36 sq ft).
Your filter's flow rate (GPM) must be equal to or higher than your pump's output. For example, a 20,000-gallon pool with a pump turnover of 42 GPM requires a filter rated for at least 43 GPM. Capacity Chart:
Most expensive; requires adding DE powder after backwashing. 2. Determine the Correct Size
Premium filtration; catches tiny particles for "sparkling" water.
For a rectangular pool, use: Length × Width × Average Depth × 7.5 = Total Gallons .
The three main types vary by their filtration precision (measured in microns) and maintenance needs. Filtration Level 20–40 microns Budget-friendly; low maintenance; lasts 5–8 years. Least precise; requires backwashing (wastes water). Cartridge 10–15 microns No backwashing; easier to install for above-ground pools. Cartridges need replacing every 1–2 years. D.E. (Diatomaceous Earth) 1–5 microns
Pool Filter Sizing - How to Choose the Right Size - Leslie's Pool Supplies
Sand (~3.0 sq ft), Cartridge (100–200 sq ft), DE (36 sq ft).
Your filter's flow rate (GPM) must be equal to or higher than your pump's output. For example, a 20,000-gallon pool with a pump turnover of 42 GPM requires a filter rated for at least 43 GPM. Capacity Chart:
Most expensive; requires adding DE powder after backwashing. 2. Determine the Correct Size
Premium filtration; catches tiny particles for "sparkling" water.
For a rectangular pool, use: Length × Width × Average Depth × 7.5 = Total Gallons .
The three main types vary by their filtration precision (measured in microns) and maintenance needs. Filtration Level 20–40 microns Budget-friendly; low maintenance; lasts 5–8 years. Least precise; requires backwashing (wastes water). Cartridge 10–15 microns No backwashing; easier to install for above-ground pools. Cartridges need replacing every 1–2 years. D.E. (Diatomaceous Earth) 1–5 microns