
API · budget
API pH Test Kit (250-test)
93 / 100A+4.6★ (3,350 reviews)
$7.98
A cheap, accurate liquid pH kit — the single most useful first test, covering the low range most tap water and community tanks sit in.
Pros
- Liquid reagent gives granular readings a strip cannot, right across the low range
- Hundreds of tests in one small bottle — an economical cost per test
- Clear colour chart, numbered vials and good instructions
- Matches lab results for freshwater pH in good light
Cons
- Tests pH only — you still need ammonia, nitrite and nitrate kits
- Low- and high-range are two separate bottles for the full pH picture
Score breakdown
Accuracy & Range
100
Cost Per Test
100
Ease of Reading
100
Owner Satisfaction
81
Value
87
Specifications
| Parameters Tested | pH (low range 6.0–7.6) |
|---|---|
| Test Count | 250 tests |
| Reagent Type | Liquid (colorimetric) |
| Refill Available | No — buy the kit |
| Shelf Life | ~3 years |
| Chart Type | Laminated colour card |
| Vial Count | 1 glass tube |
| Instructions | Booklet |
Alternatives

$36.26 · 89 / 100A
The accuracy reference for freshwater: a liquid reagent kit that reads far more granular than strips and covers the full ammonia nitrite nitrate cycle plus high- and low-range pH.

$24.98 · 85 / 100A−
The fast everyday check — five parameters in about a minute. Less granular than liquid, but the most-reviewed strips in the hobby.
Some links are affiliate links: if you buy through them we may earn a commission at no extra cost to you. It never changes our rankings. Full disclosure.
