Pool 7-in-1 Test Strips (50 strips)

7-in-1 pool test strips reading free chlorine, total chlorine, bromine, pH, total alkalinity, calcium hardness and cyanuric acid in 15 seconds. Tub of 50 strips covers a full season.

• Reads 7 parameters from one strip in 15 seconds.
• Covers free chlorine, total chlorine, bromine, pH, TA, calcium and CYA.
• Colour-match panel printed on every tub.
• Tub of 50 strips covers a typical 6-month swim season.
• Reliable accuracy for routine domestic pool testing.

Sizes and prices

• 50 strips: £14.00

When you need it

• Daily routine test on a domestic pool.
• Quick spot check before letting bathers into the pool.
• Weekly chemistry log without setting up a liquid kit.
• First test on a freshly filled or refilled pool.
• On-site test at a holiday home with no liquid kit available.

How to use

1. Take a sample 30 cm below water surface, away from skimmer and returns.
2. Remove one strip from the tub; reseal tub immediately.
3. Dip strip in pool water for 1 second; do not shake.
4. Hold strip pad-side up for 15 seconds.
5. Match each pad against the colour chart on the tub side.
6. Log readings; act on any out-of-band values.

Dosing guide

One strip per test event. Typical domestic pool tests once daily in summer and twice weekly off-season. A 50-strip tub lasts roughly 6 months for a domestic pool.

• For 50-strip tub, add Approx 50-60 days cover to reach Daily summer testing.
• For 50-strip tub, add Approx 6 months cover to reach Twice weekly off-season.
• For 100-strip tub, add Daily summer cover to reach Routine 6 months.
• For Domestic pool, add Daily peak season to reach Recommended frequency.
• For Commercial pool, add Twice daily, log all to reach Recommended frequency.

How it works

Multi-pad test strip with discrete reagent pads for free chlorine, total chlorine, bromine, pH, total alkalinity, calcium hardness and cyanuric acid.

Each reagent pad contains a colour-developing chemistry that reacts with the target ion in the pool water. The colour intensity scales with concentration and is matched against a printed reference chart for a semi-quantitative reading.

Without testing you are dosing blind. Strips give a fast routine reading that catches drift before it becomes a problem. Liquid kits are more accurate but the friction of using one daily means most owners skip tests.

Frequently asked questions

How many strips per tub?

50 strips per standard tub; 100 strip tubs available.

How accurate are they?

Within 0.2 of a unit on pH, within 1 ppm on chlorine. Sufficient for routine domestic testing.

Can I share with a hot tub?

Yes for free chlorine, bromine, pH and TA. CYA reading is irrelevant to hot tubs.

Pack sizes?

50 and 100 strip tubs.

Strips or liquid kit?

Strips for routine speed; liquid kit when accuracy matters or you need to verify a strange reading.

Shelf life?

12 months unopened; 6 months once opened. Always reseal immediately after each strip.

What chemistry do they use?

Multi-pad reagent strips: DPD-1 for free chlorine, DPD-3 for total, methyl orange for pH, bromcresol green for alkalinity, EDTA for hardness, melamine for CYA.

Why two chlorine pads?

Free chlorine reads the active sanitising fraction; total chlorine reads free plus combined. Subtract for combined.

Why not just CYA strip?

Multi-strips are more economical for routine testing. Dedicated CYA strips offer slightly better accuracy in 50-100 ppm range.

Strips bleeding?

Dip 1 second only; tap dry; hold flat.

Numbers don't match?

Reseal tub; replace if over a year old.

7-in-1 vs 6-in-1?

7-in-1 adds CYA; 6-in-1 covers everything else. CYA is essential for outdoor pools, optional for hot tubs.

Strips vs photometer?

Strips are colour-match (semi-quantitative); photometer is digital (quantitative). Choose by budget and accuracy need.