How to Clean Pool Filters After Winter

Why Winter Takes a Toll on Pool Filters

If you've been away or simply letting your pool sit through the cooler months, your filter has been working overtime—or collecting whatever fell into it. Here in Central Florida, our mild winters mean pools stay functional year-round, but that also means filters accumulate leaves, pollen, and mineral deposits. By early spring, most filters need attention before you can safely use the pool again.

What Type of Filter Do You Have

Before you start, identify your filter type. Most residential pools in The Villages, Mount Dora, and surrounding areas use one of three: sand filters, cartridge filters, or diatomaceous earth (DE) filters. Each requires slightly different cleaning methods, so knowing yours matters.

Sand and DE Filters

These use the backwash method. Turn off your pump, set the multiport valve to "backwash," and run the pump for 3–5 minutes until the water runs clear in the sight glass. Switch to "rinse" and run for another minute. Return to normal filtration and restart. This removes surface debris but doesn't address mineral buildup inside.

Cartridge Filters

These need a gentler touch. Turn off the pump, release the air valve, and open the filter housing. Remove the cartridge element and rinse it with a garden hose, working from top to bottom. For winter grime, soak it in a cartridge cleaner solution overnight, then rinse again. Let it dry before reinstalling.

The Deep Clean Your Filter Probably Needs

Backwashing or surface rinsing only goes so far. Over a winter season, minerals and oils accumulate inside the filter media itself. This reduces flow and puts strain on your pump.

For sand filters, consider a chemical filter cleanse product designed to dissolve mineral deposits. Follow package instructions carefully, as these are potent. For cartridge filters, that overnight soak is your deep clean. For DE filters, you may need to add fresh DE powder after backwashing, since some is lost each cycle.

Checking Your Pressure Gauge

Your filter's pressure gauge tells the real story. A clean filter typically runs at 10–15 PSI. After winter, you might see 20+ PSI. If deep cleaning doesn't bring it down, the filter media may be damaged and need replacement. This is one of those maintenance costs that sneaks up on owners, but it's better to catch it now than mid-summer.

Don't Forget the Pump and Plumbing

While you're at it, check your pump for debris in the strainer basket and verify that all valves open and close smoothly. Winter weather in Central Florida can loosen connections, and a few minutes now prevents leaks later.

When to Call a Professional

If your filter is more than seven or eight years old, shows visible cracks, or doesn't respond to cleaning, replacement is usually the answer. Local pool service companies throughout The Villages and Lady Lake can handle this quickly. If you're not comfortable working with pump valves and chemicals, there's no shame in calling someone in. Many seasonal homeowners find it worth the cost to have their system serviced before heading north for the season.

Spring in Central Florida is one of the best times to use a pool. A clean filter is the foundation of a clean, safe pool. Get yours done early, and you'll enjoy your water all season long.