Most above-ground pool owners should get a properly sized sand filter, and the Pentair Sand Dollar SD60 Sand Filter (22 in) is the pick that fits the widest range of backyards. It is simple to run, forgiving of mistakes, and easy to backwash (reverse the water flow to flush trapped dirt out to waste). If you want the finest water and do not mind more maintenance, a cartridge or D.E. filter is worth a look. Here is how the top picks stack up.
| Pick | Best for | Watch out for |
|---|---|---|
| Pentair Sand Dollar SD60 Sand Filter (22 in) | Most mid to large above-ground pools | Backwashing wastes some water |
| Pentair Sand Dollar SD40 Above-Ground Sand Filter | Smaller pools and tight budgets | Undersized for big pools |
| Hayward Pro Series S244T Sand Filter (24 in) | Large above-ground pools | Bulky footprint |
| Hayward Star-Clear Plus C900 Cartridge Filter (90 sq ft) | No-backwash, finer filtration | Cartridge needs hand rinsing |
| Intex Krystal Clear C2500 Cartridge Filter Pump | Small soft-side and starter pools | Frequent cartridge swaps |
| Hayward ProGrid DE4820 D.E. Filter (48 sq ft) | The clearest possible water | Most upkeep of the three types |
Best overall for most above-ground pools: Pentair Sand Dollar SD60 Sand Filter (22 in)
Mid-range
The Sand Dollar SD60 hits the sweet spot for typical above-ground pools in the roughly 15,000 to 24,000 gallon range, depending on your pump. Sand filtration is the least fussy option: water passes through a bed of sand, dirt gets trapped, and you backwash when the pressure gauge climbs. Owners like the corrosion-resistant tank and the simple multiport valve that handles filter, backwash, and rinse settings.
The tradeoff is that sand filters trap larger particles than cartridge or D.E., so your water is clean but not quite glass-polished. Backwashing also sends a few hundred gallons down the drain each time. For most families who just want reliable, low-drama filtration, that is a fair deal. Check your pump's flow rate against the filter listing before buying so the two are matched.
Best for smaller pools and budgets: Pentair Sand Dollar SD40 Above-Ground Sand Filter
Mid-range
The smaller Sand Dollar SD40 is built for compact above-ground setups, generally under about 15,000 gallons paired with a modest pump. It gives you the same easy sand-filter routine in a smaller, cheaper tank. For a 24-foot round or smaller oval pool with light bather load, it is often plenty.
The catch is that undersizing a filter is a real problem: too small a tank means shorter runs between backwashes and more strain on your equipment. If your pool is on the larger side, or you host a lot of swimmers, step up to the SD60 or a 24-inch tank instead. When you are between two sizes, bigger is the safer choice.
Best for large above-ground pools: Hayward Pro Series S244T Sand Filter (24 in)
Mid-range
The Pro Series S244T is a 24-inch sand tank aimed at bigger above-ground and smaller in-ground pools. The larger sand bed means more surface area to catch dirt, longer intervals between backwashes, and easier flow for a stronger pump. Owners with 24-foot round or large oval pools tend to reach for a tank this size.
The downside is footprint and weight: a 24-inch tank full of sand is heavy and takes up more deck space beside the pool. It also needs a pump with enough flow to make use of the extra capacity, so pair it thoughtfully. The U.S. Department of Energy notes that a right-sized, efficient pump paired with the filter saves real money on running costs, so match the two rather than overbuying one.
Best cartridge filter (no backwashing): Hayward Star-Clear Plus C900 Cartridge Filter (90 sq ft)
Mid-range
If the idea of backwashing water down the drain bugs you, the Star-Clear Plus C900 is a strong cartridge pick for above-ground pools. Cartridge filters use a pleated element that traps finer dirt than sand, and you clean it by pulling the cartridge and hosing it off. No multiport valve, no waste line, and generally clearer water.
The tradeoff is hands-on cleaning: you rinse the cartridge every few weeks and soak it in filter cleaner a couple of times a season to keep flow up. Cartridges also wear out and need replacing every few years. If you would rather spend ten minutes with a hose than run a backwash, this is a comfortable fit. It also pairs fine with a saltwater setup.
Best for small and starter pools: Intex Krystal Clear C2500 Cartridge Filter Pump
Budget
The Intex Krystal Clear C2500 is a combined pump-and-cartridge unit made for small soft-side and starter above-ground pools. It is inexpensive, plugs in, and comes ready to run, which makes it the easy answer for a seasonal or first-time pool. For a small round pool with light use, it does the basic job.
The honest tradeoff is capacity: the small cartridge fills with dirt quickly, so you will rinse or swap it often, especially in a dusty or leafy yard. It is not the filter for a big pool or heavy swimmer load. Think of it as right-sized for small water, and plan on keeping spare cartridges on hand.
Best for the clearest water: Hayward ProGrid DE4820 D.E. Filter (48 sq ft)
Hayward
W3DE4820
Premium
When you want water that looks like glass, a D.E. filter like the ProGrid DE4820 is the top of the food chain. D.E. stands for diatomaceous earth, a fine powder you add through the skimmer that coats internal grids and strains out the smallest particles of the three filter types. Owners chasing sparkling, polished water often end up here.
The tradeoff is upkeep. You backwash like a sand filter and then recharge with fresh D.E. powder each time, and you periodically break the unit down to clean the grids. It is the most involved filter to own. If you are willing to trade some weekend maintenance for the clearest water on this list, it delivers. If not, sand or cartridge will keep you happier.
How to pick the right filter for your pool
Start with pool volume and pump flow, then choose the filter type that matches how much maintenance you want to do. Sand is the simplest, cartridge skips backwashing and grabs finer dirt, and D.E. gives the clearest water for the most effort. Whatever you pick, size it to your pump so neither one is fighting the other. You can compare current options on our pool filters page.
A filter only does its share of the work, though. Clean water still depends on balanced chemistry, so keep your chlorine, pH, and CYA (cyanuric acid, the stabilizer that protects chlorine from sunlight) in range. The CDC's guidance on home pool water treatment is a solid baseline, and our plain-English walkthrough on pool chemistry basics covers what to test and add. Running a salt system? The filter choices above all work with salt, and our saltwater pool maintenance guide has the details. If you also own a hot tub, the same test-and-balance habits apply, laid out in our hot tub maintenance guide.
One last honest note: the exact gallon and flow ranges above are general guidance, not a promise for your specific pool. Always check the flow rating and sizing chart on the actual filter and pump listings, and read the manual before you buy. When you are stuck between two sizes, the bigger filter almost always ages better.
Frequently asked questions
What size filter do I need for my above-ground pool?
Match the filter to your pump flow and pool volume, and when in doubt go one size up. A bigger filter runs longer between cleanings and puts less strain on the pump, so oversizing is usually the safer mistake. Check the flow rating on both the pump and filter listing before you buy.
Sand, cartridge, or D.E. for an above-ground pool?
Sand is the simplest and most forgiving, cartridge traps finer dirt with no backwashing, and D.E. filters the finest but needs the most fuss. Most above-ground owners are happy with sand or cartridge. D.E. shines when you want polished, glass-clear water and do not mind the upkeep.
How often should I clean or backwash my filter?
Watch the pressure gauge, not the calendar. When pressure climbs 8 to 10 psi above the clean starting reading, it is time to backwash sand or D.E., or rinse a cartridge. The exact interval depends on your bather load, debris, and pool size, so let the gauge tell you.
Can I run a saltwater pool on any of these filters?
Yes. Sand, cartridge, and D.E. filters all work with salt systems since the filter handles debris, not salt. Just confirm the filter housing materials are salt-compatible in the listing, which most modern units are. See our saltwater guide for the full picture.
Do I need to change the sand or cartridge every year?
Not usually. Filter sand often lasts 5 to 7 years before it wears smooth and stops grabbing dirt, while cartridges typically last 2 to 4 seasons with regular cleaning. Replace them when water clarity drops even after a fresh clean, or when the cartridge pleats tear.
