Spa Water Test Strips 3 in 1

3-in-1 hot tub test strips for free chlorine, bromine and pH. Fast colour-match read in 15 seconds, ideal for daily routine testing on a domestic spa.

• Reads chlorine, bromine and pH in 15 seconds.
• Compact strip with 3 reagent pads.
• Tub of 50 strips covers 6-12 months of routine testing.
• Reliable accuracy for sanitiser and pH band checks.
• Compatible with bromine, chlorine and salt-water spas.

Sizes and prices

• 1 pot: £9.11
• 50-pot box: £364.40

When you need it

• Daily routine sanitiser and pH check on a hot tub.
• Quick spot test before letting bathers in the tub.
• Travel-friendly test for holiday lets and Airbnb tubs.
• First test on a freshly filled hot tub.
• Routine check between weekly multi-parameter tests.

How to use

1. Take a sample 30 cm below water surface, away from jets.
2. Remove one strip from the tub; reseal tub immediately.
3. Dip strip in tub 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 tub side.
6. Log readings; act on any out-of-band values.

Dosing guide

One strip per test event. Domestic hot tub typically tests once daily; commercial twice daily. A 50-strip tub lasts 6-12 months for a domestic spa.

• For 50-strip tub, add Approx 50 days cover to reach Daily testing.
• For 50-strip tub, add Approx 6 months cover to reach Twice weekly testing.
• For 100-strip tub, add Approx 100 days cover to reach Daily testing.
• For Domestic spa, add Once daily during use to reach Recommended frequency.
• For Commercial spa, add Twice daily, log all to reach Recommended frequency.

How it works

Multi-pad test strip with 3 reagent pads for free chlorine / bromine, total chlorine, and pH using DPD and methyl orange chemistries.

Each reagent pad develops a colour proportional to ion concentration. The colour intensity is matched against a printed chart for a semi-quantitative reading. The chlorine pad reads bromine via the standard DPD cross-reactivity.

Daily testing on a hot tub catches sanitiser and pH drift early before it triggers cloudy water or skin irritation. The 3-pad form is the simplest routine check possible.

Frequently asked questions

How many strips per tub?

50 strips per standard tub; 100 strip tubs available.

Will it read bromine?

Yes. The chlorine pad reads bromine via DPD cross-reactivity; multiply chlorine reading by 2.25 for bromine.

How accurate?

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

Pack sizes?

50 and 100 strip tubs.

3-in-1 or 6-in-1?

3-in-1 for daily speed; 6-in-1 covers alkalinity and hardness too. Most owners run a 3-in-1 daily and 6-in-1 weekly.

Shelf life?

12 months unopened; 6 months once opened.

What chemistry?

DPD chlorine / bromine pad, DPD total pad, methyl orange pH pad.

Why DPD?

DPD-1 (free) and DPD-3 (total) are the world standard for chlorine and bromine residual measurement.

Strips bleeding?

Dip 1 second only; tap dry; hold flat.

Numbers don't match?

Reseal tub; replace if over a year old.

3-in-1 vs 6-in-1?

3-in-1 is daily speed; 6-in-1 adds alkalinity, hardness and CYA. Use both.

Strips vs liquid kit?

Strips for daily; liquid for accuracy when verifying odd readings.