Pool math without the guesswork.

Saltwater vs Chlorine Pool

Cost, maintenance, feel, and which one to actually choose.

Free vs Total Chlorine

What each one measures and why the difference matters.

Bromine vs Chlorine

Which sanitizer for a pool, and which for a hot tub.

Above-Ground vs In-Ground Pool

Cost, lifespan, value, and upkeep, and which one is actually worth it.

Liquid Chlorine vs Tablets

Tablets raise cyanuric acid; liquid does not. Which to use for daily chlorination, and when.

Pool Clarifier vs Flocculant

Clarifier clumps fine particles for the filter; floc sinks them to vacuum to waste. Which clears a cloudy pool, and when.

Variable-Speed vs Single-Speed Pool Pump

Energy use, cost, noise, and payback. Why variable-speed wins for almost every pool.

Sand vs Cartridge Pool Filter

Filtration fineness, cleaning, water waste, and cost. Why cartridge wins for most residential pools, and when sand still makes sense.

Gas vs Heat Pump Pool Heater

Running cost, heating speed, cold-weather performance, and lifespan. Why a heat pump wins for most warm-climate pools, and when gas is still the right call.

Cal Hypo vs Dichlor

Chlorine strength, pH, and what each one adds to your water. Cal hypo is the better shock for most pools; dichlor is for hot tubs, new pools, and adding stabilizer.

Cal Hypo vs Liquid Chlorine

Both are unstabilized, but only cal hypo builds up calcium. Liquid chlorine is the cleaner default for regular dosing and hard water; cal hypo wins for concentrated, shelf-stable, occasional shocking.

Muriatic Acid vs Dry Acid

Both lower pool pH and total alkalinity, but muriatic adds only trace chloride while dry acid builds up sulfates. Muriatic is the cheaper default for outdoor and saltwater pools; dry acid is safer to handle for spas, indoor, and small pools.

Propane vs Natural Gas Pool Heater

The same heater, a different fuel: natural gas costs about half as much to run and never runs out, while propane installs anywhere with a tank. Buy natural gas if a line reaches the pad; choose propane when it does not.

DE vs Sand Pool Filter

A DE filter strains the finest water of any filter but needs recharging after every backwash; a sand filter is coarser but the cheapest and most hands-off. Buy sand for most pools; choose DE when you want the clearest water and will do the work.

DE vs Cartridge Pool Filter

A DE filter strains the finest water of any filter but needs recharging with powder after every backwash; a cartridge filters a bit coarser yet wastes no water and needs no powder. Buy a cartridge for most pools; choose DE when you want the clearest water and will do the work.

Solar vs Heat Pump Pool Heater

Solar heats for free but only when the sun is out; a heat pump costs something to run yet heats on demand, day or night, and holds a set temperature. Buy a heat pump for dependable heat you control; choose solar for the lowest running cost when you have the sun and roof space.

Mineral System vs Chlorine Pool

A pool mineral system releases silver and copper ions so you can run free chlorine near 0.5 ppm instead of 1 to 3 ppm, but it never replaces chlorine. Stay with plain chlorine for most pools; add minerals only if your chemistry is steady and you will watch copper for staining.

Baquacil vs Chlorine Pool

Baquacil (biguanide) is chlorine-free and gentler on skin and eyes, but it costs two to four times more, only sanitizes so you still buy an oxidizer, gums up filters, and is prone to cloudy water, white water mold, and pink slime. Chlorine is cheaper and more reliable for almost every pool; here is how to convert a Baquacil pool back.

Robotic vs Suction Pool Cleaner

A robotic cleaner brings its own motor and filter to scrub the floor, walls, and waterline on about 180 watts without your pump; a suction cleaner is far cheaper but runs off your pump, covers only the floor and lower walls, and dumps debris into your filter. Buy a robot for most pools; choose suction when the upfront price is the deciding factor.

Pressure vs Suction Pool Cleaner

A pressure cleaner collects debris in its own bag and often needs a booster pump, so it keeps leaves and acorns out of your filter; a suction cleaner is cheaper and simpler but sends its debris into your filter and only picks up fine grit. Buy suction for most pools; choose pressure for a leafy yard.

Robotic vs Pressure Pool Cleaner

A robotic cleaner runs on its own motor and filter to scrub the floor, walls, and waterline on about 180 watts with the pump off; a pressure cleaner needs your pump plus a booster but its big bag swallows a heavy leaf load. Buy a robot for most pools; choose pressure for a very leafy yard or simple, repairable equipment.

Ozone vs UV Pool System

Ozone injects a powerful oxidizer gas that cuts chlorine use and destroys chloramines the most; a UV system shines germicidal light to inactivate microbes, including the chlorine-resistant Crypto and Giardia, with far less to manage. Both are supplements that still need a chlorine residual. Install UV for most pools; choose ozone for the strongest oxidation.

Pool Heater vs Solar Cover

A heater actively adds heat on demand; a solar cover only slows heat loss and captures free sun for about a 5 to 10 degree gain. Buy the cover first for the cheapest warmth, add a heater when you need a set temperature you control, and never run a heater without a cover.

In-Floor Cleaning System vs Suction Cleaner

An in-floor system is a set of pop-up floor nozzles built into the pool that sweep the whole floor and circulate the water, but it costs thousands and only goes in at build time; a suction cleaner is a $150 to $450 add-on that clips onto any existing pool. Buy a suction cleaner for a pool you already own; spec an in-floor system into a new build.

Fiberglass vs Concrete Pool

A fiberglass pool is a factory-molded shell that installs in weeks, resists algae, and needs the least upkeep, but comes in fixed shapes and sizes; a concrete (gunite) pool is built on site in any shape or depth and lasts a lifetime, but costs the most and needs replastering every 10 to 15 years. Choose fiberglass for a standard family pool; choose concrete for a fully custom or very large design.

Vinyl Liner vs Fiberglass Pool

A vinyl-liner pool is the cheapest inground pool to install and adapts to large or custom shapes, but it needs a new liner every 5 to 9 years; a fiberglass pool costs more up front yet is the lowest-maintenance, cheapest pool to own long term with no liner to replace. Choose vinyl for the lowest upfront price or a big custom pool; choose fiberglass for the least hassle on a standard-size pool.

Vinyl vs Concrete Pool

A vinyl-liner pool is the cheapest inground pool to install and the easiest to keep, needing a new liner every 5 to 9 years; a concrete (gunite) pool is built in any shape or depth and lasts a lifetime, but costs the most up front, needs replastering every 10 to 15 years, and uses the most chemicals. Choose vinyl for the lowest cost and least fuss; choose concrete for a fully custom, large, or luxury design.

Trichlor vs Dichlor

Both are stabilized chlorines that add cyanuric acid, but trichlor is a slow-dissolving acidic tablet for hands-off daily chlorination and dichlor is a fast, near-neutral granular for shocking, spas, and new pools. Use trichlor in a feeder for everyday chlorine; use dichlor for quick granular dosing, and switch to unstabilized chlorine once your CYA climbs too high.