Swimming Pool Filter Comparison: Sand, Cartridge, or DE—Which Is Right for You?

Pool filtration isn't one-size-fits-all. Sand, cartridge, and diatomaceous earth (DE) systems each offer distinct trade-offs in cost, maintenance, water clarity, and longevity. Your priorities determine the best choice.

Sand Filters: The Balanced Workhorse

Silica sand traps debris as water flows top-to-bottom. Backwashing reverses flow to flush contaminants. Pros: Lowest operating cost, simple maintenance, mid-range purchase price. Cons: Filters to ~20 microns only; sand replacement every 5–7 years.

Cartridge Filters: Convenience at a Price

Pleated polyester cartridges capture particles to ~10 microns. Clean by hosing off; replace every 1–3 years. Pros: Lowest upfront cost, easy cleaning, no backwashing water waste. Cons: Highest long-term cost (replacement cartridges), less effective on fine particles.

DE Filters: Ultimate Water Polish

DE powder coats grids, filtering to 5 microns—near-drinking-water clarity. Backwash and recharge with fresh DE when pressure rises 5 PSI. Pros: Superior clarity, intermediate operating cost. Cons: Highest purchase price, DE handling mess, more complex maintenance.

Decision Framework

Priority	Best Choice
Lowest initial cost	Cartridge
Easiest maintenance	Sand
Best water quality	DE
Lowest long-term cost	Sand

Regional Preferences and Water Chemistry

Geographic trends exist, but balanced water chemistry—proper pH, alkalinity, sanitizer—is the true foundation of clarity. No filter compensates for poor chemistry. Visit MyPool.com for equipment matched to your specific pool and location.