Swimming Pool Water Treatment

Start with what is consuming the chlorine. Fine particles, organic matter and biofilm the filter misses all use up free chlorine, so the most durable reduction comes from better filtration rather than lower set points. That is where HydroFLOW® helps: with the filter catching more, the water needs less chlorine to hold its residual. Operators then reduce dosing step by step as their tests allow. A 620 m³ wave pool in Ukraine went from 15 litres of chlorine a day to 4–6, and a residential complex in India cut chemical costs around 55%. Never drop below the residual your local regulations require.

The sharp “chlorine” smell is usually chloramines, also called combined chlorine: compounds formed when chlorine reacts with sweat, urine and other organic matter bathers bring in. A strong smell normally means too much organic load and combined chlorine, not too much free chlorine. Ventilation, fresh-water dilution and good bather hygiene all help; so does removing more organic matter at the filter, so there is less for chlorine to react with. At the India residential complex, the strong chlorine odour went once filtration improved and dosing came down.

Check the basics first: pH, alkalinity, free and combined chlorine, and whether the filter is running long enough and is clean. If the chemistry is right and the water is still dull, the cause is usually fine particles too small for the filter to catch. The conventional answer is a chemical clarifier or flocculant to clump them together. HydroFLOW® does that physically, with nothing dosed, so the filter catches more on every pass. The Ukraine wave pool was clear within 12 days of installation, under full bather load.

Green water is algae, which takes hold when the disinfectant residual drops or circulation and filtration leave it somewhere to grow. Restore the residual and correct the pH first: that is the immediate fix. HydroFLOW® helps with the longer-term cause by improving filtration and disrupting the biofilm algae rely on. At the India residential complex, algae stopped clouding the water once filtration improved, and the Ukraine wave pool went from green to clear within 12 days. It works alongside your disinfection, not instead of it.

Follow your filter manufacturer’s guidance, which is usually based on the pressure difference across the filter and on regular schedules set by the operator. What changes the answer is how quickly the filter loads up and how well it clears. Backwashing costs more than people expect, because every wash sends heated, treated water to drain. With better flocculation, filters can run longer between washes: a public indoor pool in Colmar was washing 78 times a year at 52.5 m³ a wash and saved 2,535 m³ of water a year, and the India complex went from backwashing every two days to weekly.

Both make fine particles clump together so the filter can remove them: a clarifier makes small clumps the filter catches, a flocculant makes heavy flocs that settle to the floor to be vacuumed. Both are dosed chemicals with an ongoing cost. HydroFLOW® produces the same clustering effect physically, through its signal. A private villa pool in Tunisia stopped using flocculants completely after a K40 was fitted, and used nearly 40% fewer pool chemicals overall.

Yes. Heat drives calcium out of solution, so scale forms fastest on heater elements and heat-exchanger plates, exactly where the pool’s energy is spent; around 1 mm of scale can cut heat-transfer efficiency by about 7%. HydroFLOW® keeps calcium crystallising in suspension so it is carried away rather than bonding to hot surfaces, and gradually loosens existing deposits without acid descaling. On hot spring water above 400 ppm in Taiwan, scale stayed soft and flushed away, and maintenance costs fell by half or more.

Scepticism is earned: there are plenty of cheap wrap-around descalers with little behind them. We would make three distinctions. First, mechanism: HydroFLOW® is not a magnet; it induces a patented ~150 kHz signal into the water, and pool units are sized to the pipe, from the K40 for private pools to the P Range for commercial circulation lines. Second, evidence: the results on this page are operators’ own records, such as Colmar backwash logs, Ukraine daily chlorine use and a Hong Kong theme park cutting pool sodium hypochlorite 14%. Third, verifiability: judge it on your own pool, with your own backwash log, chemical deliveries and water tests.

Not a public or commercial pool, and we would not advise it for a private one. A residual disinfectant protects bathers from what other bathers bring in, and local regulations set the level. HydroFLOW® makes a pool chemical-light: it lowers the chlorine the water consumes and can replace clarifiers and flocculants, but the residual stays. The Ukraine wave pool still doses chlorine, at 4–6 litres a day instead of 15.

Neither, and it does not replace either. It does not inactivate bacteria or Cryptosporidium, which can survive more than seven days in properly chlorinated water; that is the job of your residual, and of UV where your regulations require it. It does not remove anything itself: it helps your existing filter catch more. In the first weeks you may see more material at the strainers and in backwashes as existing deposits loosen. If your water problem is supply quality or a failing filter, fix those first, and we will tell you so.

Yes. The unit installs around the outside of the existing circulation pipe, typically before the pump and filters, with no cutting, no drain-down and no closure; the Ukraine and Colmar units both went in with the pool open. Clarity usually moves first: the Ukraine wave pool was clear within 12 days. Backwash and chemical savings build over the following months as operators adjust their routines to their test results, and Colmar’s payback came in 0.7 years. That makes a trial straightforward: one unit, measured against your own records.