Best pool test kit: drops, strips and digital testers compared
2026-10-23 · 8 min read
For most pools the best test kit is a FAS-DPD drop kit such as Taylor’s K-2006: it splits free from combined chlorine by counting drops, not by matching a shade, and it covers every reading you dose from. Strips are for a quick check between visits. A photometer earns its keep when you test many pools a day and want the numbers written down for you.
Best overall
Taylor K-2006
Free and combined chlorine counted in drops, plus every other reading a dose depends on.
Best budget
Taylor K-1000
The smallest kit here: chlorine, bromine and pH only, for checks between full tests.
Best for large routes
LaMotte Spin Touch
One disk, under 3 mL of water, the panel in about a minute, results stored and sent.
Five pool test kits, read 2026-10-23
Our pick — Taylor K-2006 Complete (FAS-DPD)
| Kit | Method | Readings | Chlorine | Refill |
|---|---|---|---|---|
| Taylor K-2006 Complete | FAS-DPD drop titration | Free and combined chlorine, pH, acid and base demand, alkalinity, calcium hardness, CYA | 0.2 ppm per drop (25 mL sample) | Liquid reagent bottles, .75 oz or 2 oz |
| Taylor K-1000 Basic | OTO comparator, colour match | Total chlorine, bromine, pH | Total only, no free or combined split | Liquid reagent bottles |
| AquaChek Silver 7-in-1 | Dip strip, colour chart | Free and total chlorine, bromine, pH, alkalinity, total hardness, CYA | Free 0–20 ppm, total 0–10 ppm, in colour blocks | A new bottle of strips |
| LaMotte ColorQ 2x Pro 7 | Handheld photometer, liquid reagents and tablets | Free and total chlorine, bromine, pH, alkalinity, calcium hardness, CYA | Free 0–10 ppm on a digital display | 144 liquid tests per factor; 100 tablets per tablet test |
| LaMotte Mobile WaterLink Spin Touch | Disk photometer, automatic | 14 factors, adding copper, iron, salt, phosphate and borate | Free 0–15 ppm, NSF level L1 for pools | SpinDisk reagent cartridges, sold separately |
Read live
Every cell came off the maker’s own product page on 2026-10-23.
The split that matters
Free versus combined chlorine. A kit that reads total only cannot tell you when to shock.
How we picked
Readings covered and how the endpoint is read, never by a score we made up. The table runs drops, strips, then meters.
Taylor K-2006: the FAS-DPD drop kit
The K-2006 reads free chlorine, combined chlorine, pH with acid and base demand, total alkalinity, calcium hardness and cyanuric acid. Chlorine is done by FAS-DPD titration: DPD powder turns the sample pink, then FAS titrant goes in one drop at a time until the pink “completely and permanently disappears”, in Taylor’s words. You count drops rather than judge a shade. On a 25 mL sample each drop is 0.2 ppm; on a 10 mL sample it is 0.5 ppm, and Taylor says to drop to the smaller sample once a test needs more than 50 drops.
A second titration on the same sample gives combined chlorine, the number that tells you a pool needs shocking to breakpoint. Taylor writes that “most service professionals and health officials prefer testing chlorine with FAS-DPD”, and that the pink-to-clear endpoint is easier for anyone with colour vision deficiency. It is our pick because it covers every reading a dose depends on and reads chlorine without colour matching. Taylor sells the same kit with 2 oz bottles for heavier use.
Taylor K-1000: the basic OTO kit
Taylor sells the K-1000 as a basic residential kit, and it is the smallest one here: total chlorine, bromine and pH, read by matching a colour in a comparator block. That makes it a fair check between full tests on a pool that is already balanced. What it cannot do is split free from combined chlorine, so a pool that reads 3 ppm total could be holding most of it as chloramine and you would not know. Pair it with a full kit for the readings it leaves out.
Best pool test strips: AquaChek Silver 7-in-1
AquaChek calls Silver its most comprehensive strip, listing seven readings: free and total chlorine, bromine, pH, total alkalinity, total hardness and stabilizer (cyanuric acid). Free chlorine runs 0–20 ppm, pH 6.2–8.4, alkalinity 0–240 ppm and stabilizer 0–300 ppm. Dip, wait, match each pad to the colour chart. Of the two seven-pad strips named here it reads further up: free chlorine to 20 ppm, where Taylor’s S-1403 pad stops at 10.
The catch with any strip, pool or spa, is the colour blocks. Taylor’s own 7-way strip (S-1403) prints its cyanuric acid pad at 0, 40, 70, 100, 150 and 300 ppm, so a reading between two blocks is your guess, and the cyanuric acid calculator is only as good as that guess. Strips are fine for a mid-week glance and a homeowner’s spot check. A dose you are about to pour should come off drops or a meter.
Best digital pool water tester: LaMotte ColorQ 2x Pro 7
The ColorQ 2x Pro 7 is a waterproof handheld photometer. It reads free and total chlorine, bromine, pH, alkalinity, calcium hardness and cyanuric acid and shows each on a digital display, which LaMotte says “eliminates the need to visually determine slight color variations”. Chlorine and pH use liquid reagents, enough for 144 tests per factor; the alkalinity, hardness and cyanuric acid tests use tablets, 100 of each in the case. Ranges as listed: free chlorine 0–10 ppm, pH 6.5–8.5, alkalinity 0–300 ppm, cyanuric acid 0–150 ppm.
It suits the tech who wants a number instead of a shade but still works one vial at a time. LaMotte sells it as a Bluetooth model, packed with its reagents in a carrying case.
Best automatic pool water tester: LaMotte Mobile WaterLink Spin Touch
The Spin Touch is the store lab in a carry case. You fill one sealed SpinDisk with “less than 3 mL of water” and the photometer runs every test on the disk by itself: LaMotte lists one minute for its treated-water disk and two for its well-water disk. Up to 14 factors are available, including salt, phosphate, copper, iron and borate, though each disk series carries its own set.
For a route it matters that it runs on a battery (about 150 tests per charge), stores 250 results for download to a PC or transfer over Bluetooth, with WaterLink apps for Android and iOS. So the panel leaves the pool already written down, ready for the route software or paper log you keep. The disks are sold separately; some series are single-use, others good for three tests.
Which pool test kit is most accurate?
No maker publishes a head-to-head accuracy score, and we will not invent one. The one independent yardstick is NSF/ANSI/CAN 50 certification for water quality testing devices, graded L1, L2 or L3 per reading, with L1 the highest. LaMotte lists the WaterLink Spin Touch at L1 for pool pH (6.4–8.6), free chlorine (0–15 ppm), combined chlorine (0–1 ppm) and cyanuric acid (5–50 ppm), effective June 2023, and publishes per-reading levels for the ColorQ 2x as well. Readings outside those ranges were not evaluated, so check the current listing on nsf.org before you quote a level to a health inspector.
Drop kits get there a different way: an FAS-DPD titration ends on a colour change rather than a colour match, so the error is in counting drops, not in reading a shade. Strips read in blocks, which makes them the least precise of the three methods however good the pads are. If you landed here looking for the most accurate pool test strips, the honest answer is that the method caps them.
The readings a pool test kit has to cover
A professional pool test kit earns its place by covering every reading you dose from. The free chlorine, pH, alkalinity, cyanuric acid and salt bands are the ones every PoolStops calculator uses. The combined chlorine line is the Pool & Hot Tub Alliance maximum Taylor cites, a ceiling to stay under; our shock calculator treats 0.4 ppm, the action level in CDC’s Model Aquatic Health Code (5th edition, 2024), as the point to shock. The last column says which of the five kits reads each one.
| Reading | Band | Read by |
|---|---|---|
| Free chlorine | 1–3 ppm | Four of the five; the K-1000 reads total only |
| Combined chlorine | ≤ 0.2 ppm | K-2006 and both LaMotte meters; strips only as total minus free, and Taylor’s total chlorine pad steps 0, 0.5, 1 ppm |
| pH | 7.2–7.8 | All five |
| Total alkalinity | 80–120 ppm | All but the K-1000 |
| Cyanuric acid | 30–100 ppm | All but the K-1000 |
| Salt | 2,400–3,400 ppm | Spin Touch; Taylor sells a K-2006 with a salt test |
Once you have the numbers, the chlorine calculator and the saturation index calculator turn them into a pour.
Keep the reagents alive
The best kit reads wrong on dead reagent. Taylor says its reagents are made to stay effective for at least one year and advises replacing them at the start of each season. Store them between 36°F and 85°F and away from treatment chemicals, which rules out the truck bed in July. A reagent that has changed colour, or grown particles that will not shake back in, gets replaced. Buy bottle sizes you will finish within the year; a big bottle you throw away half-full is not a saving.
Buying checklist
- Make sure it reads free and combined chlorine, not total alone.
- Check it covers pH, alkalinity, calcium hardness and cyanuric acid, or plan a second test for them.
- Salt pool on the route? Add a salt test or a meter that reads salt.
- Price the refills, not just the kit: reagent bottles, strip bottles or disks.
- Date every reagent when it arrives and replace it at the start of the season.