Pool Filter Cleaning
Pool filter cleaning that actually restores your flow
Cartridge, DE and sand. Cleaned properly, inspected, and reported back to you.
Pool filters in Central Florida should be deep cleaned every three to six months, or whenever pressure runs 8 to 10 psi above the clean reading. Gil Pool Service cleans cartridge, DE and sand filters, inspects the internals for tears and wear, and reports the clean starting pressure so you know your baseline.
How often should a pool filter be cleaned in Florida?
Pressure tells you, not the calendar. But here is the pattern we see across Seminole County pools.
| Filter type | Deep clean interval | Between cleans | Media replacement |
|---|---|---|---|
| Cartridge | Every 3 to 4 months | Rinse mid cycle if pressure climbs | Elements every 2 to 3 years |
| DE (diatomaceous earth) | Every 4 to 6 months | Backwash and recharge as pressure rises | Grids every 5 to 7 years |
| Sand | Deep clean yearly | Backwash every 2 to 4 weeks | Sand every 5 to 7 years |
Pollen season shortens all of these. From late February into April, oak catkins and pine pollen load a filter in weeks instead of months. If your water goes hazy every March, that is usually the filter, not the chemistry.
How do I know my filter needs cleaning?
- Pressure is 8 to 10 psi over the clean reading. This is the real rule. If you do not know your clean reading, that is the first thing we establish.
- Water is dull or hazy even though chlorine tests fine. Chemistry kills the algae. The filter is what physically removes it.
- Weak return jets. Put your hand in front of the return. If the flow is soft, the water is not turning over.
- The pump is running hotter or louder. A choked filter makes the pump work against resistance, which is how motors die early.
What a proper filter cleaning includes
A rinse with a garden hose is not a filter cleaning. Here is what we do.
- Shut down, relieve pressure and open the housing without cracking the manifold. This is where most DIY attempts turn into a repair.
- Break down cartridges or grids and clean between every pleat, where the load actually sits.
- Degrease when needed. Sunscreen, body oil and lotion bind to the media and a water rinse does not touch it.
- Inspect for tears, collapsed cores, cracked manifolds and worn o-rings. We photograph anything failing so you are not taking our word for it.
- Reassemble, lubricate the o-ring correctly, restart, purge air and record the new clean starting pressure.
That last number is the one that matters. Without a clean baseline, "8 psi over" is meaningless and you are guessing for the rest of the year.
Why backwashing is not enough
Backwashing a DE or sand filter reverses the flow and pushes loose debris out. It never removes the oils, the compacted fines or the material bound into the pleats and grids. Sand filters in particular develop channels over time, where water carves a path straight through the bed and stops filtering. A yearly deep clean is what resets it.
Common questions
How much does pool filter cleaning cost?
A standard cartridge or DE filter cleaning in Seminole County runs $85 to $145 depending on filter size and how loaded it is. Weekly service customers get a reduced rate. Replacement parts, if we find a torn grid or cracked manifold, are quoted before we install anything.
Can I clean my pool filter myself?
You can, and plenty of owners do. The two things that go wrong are cracking the manifold or clamp band on reassembly, and rinsing without degreasing so the filter looks clean but still runs high pressure. If you clean it yourself, write down your clean starting pressure every time.
Will cleaning the filter fix my cloudy water?
Often yes, if the chemistry is already balanced. Cloudy water with good chlorine readings is almost always a flow or filtration problem. If the water is still hazy 24 hours after a proper cleaning, the next suspects are pump run time, high calcium or a phosphate load.
How long does a filter cleaning take?
Most cartridge and DE cleanings take 45 to 90 minutes on site. Sand filter deep cleans take longer and are usually scheduled on their own.
Where we provide pool filter cleaning
Oviedo, Winter Springs, Lake Mary, Longwood, Sanford, Casselberry, Chuluota, Winter Park and the surrounding Seminole County and north Orange County areas.