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Above-ground pools

Above-ground pools play by their own rules on gear — smaller water, 115V power, a filter and pump that came in the box and were probably sized by price. They play by exactly the same rules on water: free chlorine for your CYA, five numbers in range, and nothing else. Everything on this page is the part that is genuinely different. For the chemistry, the main hub covers you and this page will not repeat it.

Shopping, not troubleshooting?Above-ground gear showdowns →The chemistry is the sameStart with the 5 numbers →

Which pool you have

Easy Set, metal frame, rigid wall, semi-inground — they are not the same pool, and the difference decides what you can do to it.

Above-Ground Pool Types: Easy Set vs. Metal Frame vs. Rigid Wall vs. Semi-IngroundEasy Set, metal frame, rigid wall, semi-inground. The wall type sets your depth, your install, and whether the pool can ever be buried. And the depth on the box is not the depth you swim in.Semi-Inground Pools: What You Can Actually Bury, and What Changes When You DoThe inground look without inground money - if the pool is rated for burial. What changes underground: the depth limit is a seam, the level tolerance quarters, drainage becomes the thing that kills it, and bonding is not optional.Pool Deck Materials: Travertine vs. Pavers vs. Porcelain vs. Concrete (Heat, Slip, Salt & Cost)Travertine, limestone, shellstone, marble, concrete/brick and porcelain pavers, poured and stamped concrete, cool-deck coatings, flagstone, composite, wood, and artificial turf compared for a pool deck — heat underfoot, slip, salt, and real 2026 cost. The secret: color sets how much heat a deck absorbs, but the material decides how much it stores and how fast it burns bare feet.

Filter & pump

The two pieces of gear that come with the pool, and the two most often sized wrong.

Sand Filter vs. Cartridge Filter for an Above-Ground Pool: Which Do You Need?Cartridge for a small pool (simpler, finer, no backwashing); sand once you get bigger (the media lasts years). The crossover is around 10,000–12,000 gallons. The honest comparison, no upsell.What Size Above-Ground Pool Pump Do I Need? (It's GPM, Not Horsepower)Sizing an above-ground pump is a flow (GPM) problem, not a horsepower one. Match the pump to your pool's gallons AND your filter's rated GPM — bigger HP filters worse, not better. The turnover math, the filter ceiling, and how to replace a dead pump.

Opening & closing

The calendar jobs, in order. Both guides cover above-ground alongside in-ground.

How to Open a Pool in Spring (Without Buying a Start-Up Kit)Open early, chlorinate immediately, test before you buy anything. The in-ground and above-ground opening sequence, plus the ammonia check that stops a spring disaster.How to Close a Pool for Winter (Hard-Freeze Close vs. Florida "Winter Mode")Freeze country closes the pool. Florida doesn't. Both procedures step by step — in-ground, above-ground, and the freeze-night plan for warm climates.Mesh vs. Solid Pool Cover: The Trade-Off You Were Taught Is a Budget-Tier ProblemMesh drains, solid blocks light — except the premium covers on both sides now do both. What the choice actually turns on, and why a 'solid' cover usually isn't.

Bugs & wildlife

What is in the water, why, and what actually works.

Bugs Around the Pool: What's There, Why, and What Actually WorksA pool is a water source before it's anything else — that one fact explains most of the insects at yours, and it's why an alternative water station beats a spray for wasps and bees. Here's the species-by-species reason and fix, the one that damages your deck rather than your evening, which bugs are actually on your side, and the sourced list of popular products that do nothing.

More

Above-Ground Pool Losing Water: Find the Hole, and What Actually Patches ItThe fittings fail more often than the liner. Let the level tell you the height, dye the band it names, then patch — with a glue-and-patch kit if the hole is under water, and tape only if it is above it. The owner record and the lab test disagree on that, and we go with the owners.

The water, which is not different

Every one of these applies to your pool unchanged. An above-ground pool is smaller, so doses are smaller and mistakes move the numbers faster — the targets themselves do not change.

Chemical dosing calculatorExact doses in your gallons. Small pool, small dose — this is where over-shooting usually starts.🩺 Diagnose my poolGreen, cloudy, chlorine won't hold? Pick the symptom, get the fix.Pool volume calculatorRound or oval, and the wall height you actually filled to. Every dose starts here.

← Back to Pool SchoolThat is the whole above-ground shelf. The rest of Pool School — myths, troubleshooting, the charts — is written for your pool too.