API 5-in-1 Test Strips (100-count)
$24.98
The fast everyday check — five parameters in about a minute. Less granular than liquid, but the most-reviewed strips in the hobby.
Pros
- Reads pH and KH plus GH, nitrite and nitrate in about a minute
- The most-reviewed strips here by a wide margin — a huge, broadly satisfied owner base
- 100-count box drops the cost per test for routine weekly checks
- Distinct colours that are easy to distinguish against the bottle chart, with good instructions
Cons
- Strips are vague at the low end next to a liquid kit
- Narrow range on nitrate makes fine-tuning hard
- No ammonia pad — you still need a separate ammonia test
Score breakdown
Specifications
| Parameters Tested | pH, KH, GH, Nitrite, Nitrate |
|---|---|
| Test Count | 100 strips |
| Reagent Type | Dry test strip |
| Refill Available | Sold by the box |
| Shelf Life | ~2 years sealed |
| Chart Type | Bottle-label colour chart |
| Instructions | On-label |
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.
$14.97 · 87 / 100A
The cheapest way to eyeball six parameters — a fine budget strip for routine checks, not for diagnosing a crisis.
$7.98 · 93 / 100A+
A cheap, accurate liquid pH kit — the single most useful first test, covering the low range most tap water and community tanks sit in.
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.