Free Pool Water Testing
& Chemical Calculator
Match your 7-in-1 test strip colours, select your pool volume, and get instant chemical dosage recommendations β plus the exact products to fix any issue.
3 Steps to a Perfect Pool
Select your volume, match your strip colours to the swatches below, and get instant dosage advice.
We need your pool size to calculate accurate chemical dosages.
Match Your Strip Results
Click the swatch that best matches your test strip colour.
Your personalised results will appear here once you select a volume and complete all 6 tests.
Don't Run Out of Test Strips
Water TechniX 7-in-1 Pool Test Strips
Tests Free Chlorine, Total Chlorine, pH, Alkalinity, Hardness, Cyanuric Acid, and Bromine in one dip. 100 strips per pack.
Ideal Pool Chemical Levels
Keep these ranges bookmarked. Test 2β3 times per week for a perfectly balanced pool all season.
| Parameter | Ideal Range | Why It Matters |
|---|---|---|
| Free Chlorine | 1β3 ppm | Kills bacteria and algae to keep water sanitised. |
| pH | 7.2β7.8 | Ensures swimmer comfort and chlorine effectiveness. |
| Total Alkalinity | 80β120 ppm | Buffers pH to prevent rapid, drastic swings. |
| Cyanuric Acid | 30β50 ppm | Protects chlorine from UV destruction by sunlight. |
| Total Hardness | 175β350 ppm | Prevents corrosion of pool surfaces and equipment. |
| Total Chlorine | = Free Cl | High gap = chloramines β shock your pool immediately. |
Stock Up & Save on Pool Chemicals
Buy multiple of the same chemical and get an automatic discount applied at checkout. Stocking up saves you money and means you'll never be caught short.
Complete Your Pool Chemical Arsenal
From treating stubborn algae to keeping your equipment pristine β these are the products every pool owner should know about.
Pro Tips for Perfect Pool Chemistry
Test at the Same Time Each Day
Test in the morning before sunlight burns off chlorine, or in the early evening after the pump has been running. Consistent timing = consistent readings.
Never Mix Chemicals
Always add chemicals separately and allow the pump to circulate for at least a few hours between additions. Never pre-mix chemicals β ever.
Balance in the Right Order
Always adjust in this order: Total Alkalinity β pH β Sanitiser. Getting TA right first makes pH far easier to stabilise.
Test After Heavy Rain or Hot Days
Rain dilutes your chemicals and can drop pH and alkalinity quickly. Hot sunny days burn off chlorine faster. Test more frequently in these conditions.
Why Regular Testing is Crucial
Maintaining perfectly balanced pool water is the most important job for any pool owner. Regular water testing ensures the safety of swimmers and protects your pool equipment from costly damage.
When your chemical levels are within ideal ranges, you create a swimming environment that's safe, comfortable, and cost-effective in the long run. Catching imbalances early prevents them from becoming bigger, more expensive problems.
What Unbalanced Water Does
Too Acidic (Low pH)
Corrodes pumps, heaters and fittings. Stings eyes and skin. Strips plaster and vinyl liners.
Too Alkaline (High pH)
Chlorine becomes ineffective. Causes cloudy water, scale deposits, and constant chemical waste.
Pool Chemistry FAQ
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