Spa Water Test Strips 6 in 1

6-in-1 hot tub test strips reading free chlorine, total chlorine, bromine, pH, total alkalinity and calcium hardness in 15 seconds. The full weekly check on a single strip.

• Reads 6 parameters from one strip in 15 seconds.
• Covers chlorine, bromine, pH, total alkalinity and calcium hardness.
• Tub of 50 strips covers 6 months of weekly testing.
• Reliable accuracy for full hot tub chemistry checks.
• Compatible with bromine, chlorine and salt-water spas.

Sizes and prices

• 1 pot: £11.47
• 50-pot box: £458.80

When you need it

• Weekly full chemistry check on a domestic hot tub.
• Diagnostic test when water has gone cloudy or scaled.
• Pre-fill water test before chemistry sets up.
• Service log entry on a holiday let or Airbnb tub.
• Trip-ready test kit for travel between properties.

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. Typical hot tub tests weekly with 6-in-1 and daily with 3-in-1. A 50-strip 6-in-1 tub lasts about a year for a domestic spa.

• For 50-strip tub, add Approx 12 months cover to reach Weekly testing.
• For 100-strip tub, add Approx 24 months cover to reach Weekly testing.
• For 50-strip tub, add Approx 6 months cover to reach Twice-weekly testing.
• For Domestic spa, add Weekly with 6-in-1, daily with 3-in-1 to reach Recommended frequency.
• For Commercial spa, add Twice weekly with 6-in-1 to reach Recommended frequency.

How it works

Multi-pad test strip with 6 reagent pads for free chlorine, total chlorine / bromine, pH, total alkalinity and calcium hardness using DPD, methyl orange, bromcresol green and EDTA chemistries.

Each reagent pad develops a colour proportional to ion concentration. The colour intensity is matched against a printed reference chart for a semi-quantitative reading. Six pads on one strip cover the full hot tub chemistry routine in a single dip.

Hot tub chemistry is interconnected; you cannot diagnose one parameter in isolation. The 6-in-1 strip gives the full picture in one test, which catches root causes the 3-in-1 misses.

Frequently asked questions

How many strips per tub?

50 strips per standard tub; 100 strip tubs available.

Will it read bromine?

Yes 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, within 20 ppm on TA and hardness.

Pack sizes?

50 and 100 strip tubs.

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

Use 3-in-1 daily for sanitiser and pH; use 6-in-1 weekly for the full picture.

Shelf life?

12 months unopened; 6 months once opened.

What parameters?

Free chlorine, total chlorine, bromine, pH, total alkalinity, calcium hardness.

Why no CYA pad?

Hot tubs do not benefit from cyanuric acid stabiliser; CYA is a pool-only parameter.

Hardness saturated?

Use liquid drop test for above 400 ppm; partial drain if too high.

Alkalinity zero?

Dose alkalinity increaser; retest after 4 hours.

6-in-1 vs photometer?

Strips are colour-match (semi-quantitative); photometer is digital (quantitative). Strips for daily, photometer for service log.

6-in-1 vs liquid kit?

Liquid kit gives finer accuracy on pH and TA; strips are far faster. Most owners use both.