CliniPool / Understand your water
Temperature: the parameter that speeds up everything else
- Temperature isn't a product to dose, but it drives all the chemistry: the hotter it gets, the faster everything goes.
- Above ~28 °C: chlorine is consumed much faster AND algae grow much faster.
- It governs filtration time (temperature ÷ 2 rule) and the winterising threshold (~12 °C).
- It's the parameter the app tracks continuously via the weather to adapt its recommendations.
Water temperature isn’t a product you dose, and yet it may be the most influential parameter of your pool. It can’t be corrected — it multiplies everything else. The hotter the water, the faster the chlorine is consumed, the faster algae grow, the more the filtration has to run. Above ~28 °C, the balance tips into accelerated mode; above ~30 °C, it’s survival mode. Conversely, below ~12 °C, aquatic life slows to the point where you can winterise. Temperature is the invisible conductor, and that’s precisely what the CliniPool app tracks continuously — via YOUR pool’s weather — to adapt its recommendations without you having to think about it.
The hidden multiplier
All water chemistry obeys a simple law: heat speeds up reactions. Concretely, every degree above 28 °C devours chlorine faster (accelerated reactions, intense UV, microorganism metabolism at full tilt) while supercharging algae, whose growth is keyed to temperature. Water at 32 °C consumes an amount of chlorine that bears no relation to the same water at 24 °C, and the slightest window of under-sanitisation gets exploited immediately.
It’s the great summer classic: the spotless pool that tips into green water in 48 hours during a heatwave, without anything having changed. Nothing had changed… except the temperature, which had changed everything for us.
What temperature governs
Filtration time. The base rule is crisp: water temperature ÷ 2 = hours of filtration per day (water at 24 °C → about 12 h). The hotter the water gets, the more you need to filter — and in the thick of a heatwave, well beyond the rule, sometimes continuously. The filtration time guide (“See also”) details its nuances.
Sanitiser consumption. Hot water demands more frequent corrections and tighter testing. What holds for a week at 24 °C can run out in two days at 32 °C.
When to winterise (and reopen). The ~12 °C threshold is the frontier of aquatic life: above it, things work; below it, they sleep. You winterise below this threshold, you reopen before crossing back over it — otherwise the race against the algae starts without you.
Watching it without thinking about it
Good news: temperature is the easiest parameter to track, because there’s nothing to dose — just to observe and anticipate. That’s where the app makes the difference: it tracks your pool’s temperature and the weather continuously, automatically extends the recommended filtration when it heats up, brings test reminders closer in a heatwave, and gives the green light to winterise or recommission at the right moment. You don’t “manage” temperature — you let the app draw the consequences for everything else.
In one sentence
Temperature can’t be corrected, it commands: chlorine, algae, filtration, winterising — it all flows from it. It’s the multiplier most people forget, and the one the app watches at all times to adapt your maintenance before the heat tips the water over.
Frequently asked questions
At what temperature does pool water become hard to manage?
Beyond about 28 °C, everything speeds up: chlorine is consumed faster, algae proliferate, attendance rises. Above 30 °C, it's true survival mode (long filtration, tight testing). Below ~12 °C, conversely, the biology slows right down.
Does temperature change filtration time?
Yes, it's the very basis: the common rule is 'water temperature ÷ 2 = hours of filtration per day'. The hotter the water, the more you need to filter — and in a heatwave, well beyond the simple rule.
Why does my chlorine disappear faster when it's hot?
Heat speeds up all chemical reactions and boosts the metabolism of algae and bacteria, which consume the chlorine. Add intense UV and heavier attendance, and consumption can double or triple compared with temperate water.
What temperature to winterise a pool?
You winterise when the water stays durably below about 12 °C: below that, algae and bacteria are nearly inactive and the water 'holds' all winter. Winterising too early, water still warm, is the classic cause of spring green water.