Pool Filter Types: Sand vs. DE vs. Cartridge in South Florida

Sand, DE, or cartridge? South Florida pool filters each have real tradeoffs — and the wrong choice costs you money in constant maintenance or short filter life.

Sand filters

Traditional workhorse. Sand media filters water down to ~20 microns.

• Pros: Cheapest to operate, easy to backwash, sand lasts 5–7 years.
• Cons: Coarsest filtration — water isn't as crystal clear as other types. Backwashing wastes water (South Florida cares about this).
• Cost: $500–$900 installed.
• Best for: Larger pools with high debris loads.

DE (diatomaceous earth) filters

Finest filtration — down to 3–5 microns. The gold standard for water clarity.

• Pros: Cleanest water of any filter type. Great for high-bather-load pools.
• Cons: Annual tear-down and cleaning; DE powder handling (wear a mask); grids tear and need replacement every 5–7 years.
• Cost: $900–$1,400 installed plus annual DE ($20/yr).
• Best for: Pools where clarity matters — showcase pools, vacation rentals, pools with attached spas.

Cartridge filters

Most popular new-installation choice in South Florida. Filters down to 10–15 microns.

• Pros: No backwashing (water conservation), simple cleaning (hose off the cartridge), quiet operation.
• Cons: Cartridges wear out and need replacement every 2–4 years ($50–$150 each, most systems use 4).
• Cost: $700–$1,200 installed.
• Best for: Most residential South Florida pools — simplicity wins.

Our recommendation for South Florida

For most homeowners: cartridge filter. Simple to maintain, no water wasted backwashing (which matters during water restrictions), and micron rating is plenty for residential use.

For showcase pools and vacation rentals where water clarity is a selling point: DE filter. Worth the annual tear-down for the glass-clear water.

Ready for a filter replacement? Or see pump upgrade options.

Frequently Asked Questions