https://pooltested.comPool and hot tub guides: variable-speed pumps, sand, cartridge and DE filters, heaters and heat pumps, saltwater chlorinators, test kits, covers and spa care, for owners and rental operators.en-us https://pooltested.com/guides/how-to-calculate-pool-gallonshttps://pooltested.com/guides/how-to-calculate-pool-gallonsWork out your pool's volume in gallons for rectangular, round, oval and freeform pools, with average depth, worked examples and what it sizes.Fri, 06 Nov 2026 00:00:00 GMT https://pooltested.com/guides/inflatable-vs-hard-shell-hot-tubhttps://pooltested.com/guides/inflatable-vs-hard-shell-hot-tubInflatable and hard-shell hot tubs compared: heating speed, max temperature, jets, insulation, electrical needs, running costs, lifespan and water care.Fri, 06 Nov 2026 00:00:00 GMT https://pooltested.com/guides/pool-cover-types-comparedhttps://pooltested.com/guides/pool-cover-types-comparedPool covers compared: solar covers, winter tarps, mesh and solid safety covers and automatic covers, by heat retention, debris, safety standard and cost.Fri, 06 Nov 2026 00:00:00 GMT https://pooltested.com/guides/pool-heat-pump-vs-gas-heaterhttps://pooltested.com/guides/pool-heat-pump-vs-gas-heaterPool heat pumps vs gas heaters compared: how each works, heating speed, running costs, BTU sizing, climate limits and when solar or a cover is the better first step.Fri, 06 Nov 2026 00:00:00 GMT https://pooltested.com/guides/pool-test-kit-guidehttps://pooltested.com/guides/pool-test-kit-guideChoose a pool test kit: strips, liquid drop kits, FAS-DPD chlorine tests and digital readers, plus the levels to test for and target ranges.Fri, 06 Nov 2026 00:00:00 GMT https://pooltested.com/guides/saltwater-pool-system-guidehttps://pooltested.com/guides/saltwater-pool-system-guideHow saltwater chlorine generators work, how to size a salt cell, salt levels, cell life and cleaning, pH drift, and the real costs compared with chlorine.Fri, 06 Nov 2026 00:00:00 GMT https://pooltested.com/guides/sand-vs-cartridge-vs-de-pool-filterhttps://pooltested.com/guides/sand-vs-cartridge-vs-de-pool-filterPool filter types compared: how fine each filters, maintenance, water use, cost and sizing, plus how to match a filter to your pump's flow rate.Fri, 06 Nov 2026 00:00:00 GMT https://pooltested.com/guides/variable-speed-pool-pump-guidehttps://pooltested.com/guides/variable-speed-pool-pump-guideVariable-speed pool pumps explained: why low speed saves energy, how to size for turnover and filter flow, DOE rules, voltage, plumbing size and programming.Fri, 06 Nov 2026 00:00:00 GMT