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Nine products cover most of pool care. Tap any card for what it is, how to use it and WhatsApp ordering.
Chlorine tablets (TCCA)氯片Slow-dissolve 200 g tablets — steady everyday chlorine in 1 kg packs and 25 kg drums.
Sodium hypochlorite次氯酸鈉Liquid chlorine for dosing systems and high-turnover pools, in custom volumes.
Calcium hypochlorite次氯酸鈣Unstabilised granular shock chlorine for superchlorination and recovery.
pH increaserpH調高劑Soda ash to lift low pH — comfortable water, effective chlorine.
pH decreaserpH調低劑Dry acid to bring high pH down before it blunts your chlorine.
Alkalinity increaser鹼度調高劑Sodium bicarbonate to steady a pool whose pH keeps drifting.
Pool algaecide除藻劑Concentrated algaecide to stop green water starting — and clear it when it does.
Pool clarifier澄清劑Clarifier and flocculant to polish the cloudiness your filter can't catch.
Test kits & reagents測試用品Test kits and reagents so you dose to a number, not a guess.
Every product is quoted on enquiry — we reply within one working day.
Chlorine tablets in 1 kg packs. Work out your dose with the calculator on this page, then order in two taps on WhatsApp.
Chlorine tablets in 25 kg drums and sodium hypochlorite for dosing systems, on a standing delivery if you want one. Ask about account and invoice terms when you order.
Gotech Chemical supplies pool chlorine and pool chemicals across Hong Kong — 200 g slow-dissolve chlorine tablets in 1 kg packs and 25 kg drums, sodium hypochlorite in custom volumes, calcium hypochlorite, pH and alkalinity balancers, algaecide, clarifier and test kits — every product quoted on enquiry, reply within one working day. Tell us the product and quantity by WhatsApp, email or the form on this page and we confirm price and delivery; if you are not sure what you need, send us your pool size and we will work it out.
Pick the product, set the quantity and choose how often you want delivery. The message is written for you — send it and we confirm price and delivery. We reply within one working day.
Not sure of the volume? Send the order anyway — we confirm container sizes and volume with the price.
Prices are quoted on enquiry — we reply within one working day. No payment is taken online.
Buying chlorine is easy. Dosing the right amount is the part that saves money and protects the pool. Enter your pool and your test readings below — the calculator runs in your browser and sends nothing anywhere.
Enter the volume if you know it — or the measurements and we multiply them for you.
Correct pH first — above 7.8 much of your chlorine is in a weak form. See how pH affects chlorine.
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Dosing guidance only — always verify with a test kit. Assumptions shown; actual product strength is confirmed on your quotation. Tablet dose assumes trichlor at 90% available chlorine. Liquid dose assumes sodium hypochlorite at 10% available chlorine, about 100 g of chlorine per litre.
| Format | 200 g slow-dissolve tablets |
| Pack | 5 × 200 g (1 kg) |
| Typical use | Smaller pools, clubhouses, top-up dosing |
| Price | Quoted on enquiry — we reply within one working day. |
Slow-dissolve tablets give a steadier residual than dosing by hand and are the simplest option for a small pool — full details on the chlorine tablets page.
| Format | 200 g slow-dissolve tablets |
| Pack | 25 kg drum |
| Typical use | Hotels, estates, facilities with continuous demand |
| Price | Quoted on enquiry — we reply within one working day. |
The economical option if you get through chlorine regularly. Ask about a standing delivery — Monthly, Every 2 months or Quarterly.
| Format | Liquid |
| Volume | Custom — tell us what you need |
| Typical use | Pool and potable water disinfection, dosing systems |
| Price | Quoted on enquiry — we reply within one working day. |
Suited to automatic dosing. Liquid chlorine loses strength in storage, so order to your actual turnover rather than stockpiling — full details on the sodium hypochlorite page.
Never mix chlorine products with acid, or with each other — not even the last of an old product into a new drum. Mixing can release chlorine gas. If in doubt about storage or handling, ask us before you order.
Looking for cooling tower or boiler treatment chemicals? Scale and corrosion inhibitors, biocide programmes and dosing systems are matched to your system, not sold off a shelf — see treatment programmes, or browse the industrial range.
Gotech Chemical supplies 200 g slow-dissolve chlorine tablets in 1 kg packs and 25 kg drums, plus sodium hypochlorite in custom volumes — alongside calcium hypochlorite, pH and alkalinity balancers, algaecide, clarifier and test kits — delivered across Hong Kong. Gotech has supplied water treatment chemicals in Hong Kong since 1982.
Slow-dissolve tablets give a steadier residual and suit smaller pools and manual top-up. Liquid sodium hypochlorite suits automatic dosing systems and larger volumes, but loses strength in storage, so it should be ordered to actual turnover rather than stockpiled. Full comparison: chlorine tablets vs liquid chlorine.
Prices are quoted on enquiry — we reply within one working day. Tell us the product, quantity and delivery district by WhatsApp or the order form, and we will confirm the price and delivery in writing.
As a rough guide, raising free chlorine by 1 ppm takes about 1 g of chlorine per cubic metre of water. The dosing calculator on this page turns your pool volume and test readings into a tablet or liquid dose. Always verify with a test kit after dosing.
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Safety data sheets available on request — see the SDS library.
Tell us the product and quantity and we will confirm price and delivery.