Buy Pool Filter · Fully Tested

For a rectangular pool, use: Length × Width × Average Depth × 7.5 = Total Gallons .

Premium filtration; catches tiny particles for "sparkling" water.

Sand (~3.0 sq ft), Cartridge (100–200 sq ft), DE (36 sq ft). buy pool filter

Buying the right pool filter is the most important decision for keeping your water clear, as it handles in maintaining water quality. Use this guide to navigate types, sizing, and key compatibility factors. 1. Choose Your Filter Type

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: For a rectangular pool, use: Length × Width

Sand (~4.9 sq ft), Cartridge (400–500 sq ft), DE (60 sq ft). 3. Key Compatibility Checks

A filter that is too small will overwork your pump and lead to cloudy water. As a rule of thumb, to reduce maintenance frequency. Buying the right pool filter is the most

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