Question 1

Are cartridge filters better than sand filters for Florida pools?

Accepted Answer

For most Florida fiberglass pools, cartridge filters are the better all-around choice. They trap finer particles (down to about 10–15 microns vs roughly 20–40 for sand), they do not require backwashing so they save thousands of gallons of water each year, and they pair well with the smooth, non-porous surface of a fiberglass pool. Sand filters still make sense for very large pools or where simple, hands-off operation matters most.

Question 2

Do cartridge filters really save water compared to sand filters?

Accepted Answer

Yes. Sand filters are cleaned by backwashing, which sends 200–500 gallons of pool water down the drain every cleaning, often weekly in the busy Florida swim season. Cartridge filters are cleaned by removing and rinsing the cartridge, so you only use a fraction of that water. Over a year that difference adds up significantly, which matters in areas with watering restrictions.

Question 3

How often do you clean a cartridge filter vs a sand filter?

Accepted Answer

A sand filter is backwashed whenever the pressure gauge rises about 8–10 PSI over its clean baseline — typically every week or two in summer. A cartridge filter is rinsed every few weeks and deep-cleaned a few times a year, with the cartridge element itself replaced roughly every 2–4 years. Sand media in a sand filter is usually replaced every 5–7 years.

Question 4

Which filter is best for a salt water pool in Florida?

Accepted Answer

Both cartridge and sand filters work with salt water systems. Cartridge filters are often preferred for salt pools because their finer filtration keeps the water exceptionally clear and they avoid frequent backwashing. We help match your filter to your pump, sanitizer, and pool size during your free consultation.

Question 5

Can I switch from a sand filter to a cartridge filter?

Accepted Answer

In most cases, yes. A filter swap is a straightforward equipment-pad upgrade as long as the new filter is sized correctly for your pump and pool volume. If you are considering switching, contact us for a free assessment of your equipment pad and we will recommend the right filter for your setup.

Feature	Cartridge	Sand
Filtration fineness	Filters down to ~10–15 microns — clearer water	Filters to ~20–40 microns
Water usage	No backwashing — saves thousands of gallons/year	Backwashing wastes 200–500 gallons each time
Routine cleaning	Rinse cartridge every few weeks	Backwash weekly in summer — quick and simple
Media replacement	Replace cartridge every 2–4 years	Replace sand every 5–7 years
Energy efficiency	Lower flow resistance — works great with VS pumps	Higher resistance, especially as sand ages
Best for	Most residential fiberglass pools	Very large pools, hands-off operation

Cartridge vs Sand Pool Filters

Cartridge Filter

Sand Filter

Side-by-Side Comparison

What Matters Most in Florida

Water Conservation

Low Maintenance

Energy Savings

Frequently Asked Questions

Not Sure Which Filter Is Right for Your Pool?