Straight answers about pools, hot tubs and keeping them running
Most hot tub covers hold up well for a handful of years before the foam inside starts absorbing water and the vinyl skin cracks or delaminates. Exact lifespan depends on climate, sun exposure and how it’s treated day to day. It matters because a failing cover stops insulating, gets heavy and dangerous to lift, and … Read more
A hot tub’s filtration cycle is the pump running on a timer to pull water through the filter and past the sanitiser, over and over, whether anyone is soaking or not. It clears debris, keeps chemical distributed evenly, and stops the water from sitting still long enough to grow something unpleasant. What does the filtration … Read more
Hot tub water usually goes foamy because of a buildup of organic material — body oils, lotions, deodorant, sweat and detergent residue — that lowers the water’s surface tension. Once that residue accumulates faster than the filter and sanitizer can handle it, the agitation from the jets whips it into visible foam. What actually causes … Read more
Both bromine and chlorine kill bacteria and other organisms in hot tub water, but they behave differently at high heat and in enclosed spas. Chlorine acts faster and costs less; bromine is more stable in heat, has a milder smell, and is gentler on skin for many bathers. Neither is inherently “safer” — the right … Read more
A hot tub’s running cost comes mostly from heating and pumping water, with chemicals, filters and water changes adding a smaller but steady amount on top. The single biggest factor is how much the heater runs, which depends on climate, insulation, cover use and how often the tub gets used. What are the main things … Read more
Biofilm is a thin, slimy layer of bacteria, fungi and other microorganisms that builds up inside a hot tub’s pipes, jets and pump housing. It forms on wet surfaces that stay damp between uses, and it matters because it can shelter organisms from sanitizer, contribute to cloudy or smelly water, and flake off into the … Read more
Hot tubs need more frequent water changes because they hold a small volume of water that gets used hard: it runs hot, it’s shared by several bodies at once relative to its size, and it’s often covered between uses. Heat speeds up chemical breakdown, and a small volume dilutes contaminants far less than a full-size … Read more
Hot tub water chemistry follows the same core principles as pool chemistry — sanitizer, pH, alkalinity — but everything happens faster and with less margin for error. A much smaller volume of water, higher temperature, heavier bather load per gallon, and constant agitation mean readings shift quickly and need checking far more often than a … Read more
About what you read here. Everything on Pools Shop is general information and our own editorial opinion. We research carefully and we say when the evidence is unclear, but we can be wrong, things change, and no article can know your particular situation. Please do your own research and make your own judgement rather than treating anything here as the final word. Prices, products and specifications around pools, hot tubs and their upkeep change constantly, and what suits one person will not suit another. Check current details yourself, and where a decision involves real money, safety or something you cannot undo, it is worth confirming with a qualified pool or electrical professional before you act.