Measures nitrate, nitrite, pH, GH, KH, and chlorine
Results in 15 to 60 seconds
Available in two sizes: 25 and 200 tests
Frequently testing your water quality is one of the keys to successful fishkeeping. We developed the Aquarium Co-Op ...
Reviews
4.9
73 ratings
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These things save me so much time, are really accurate, and let me test my water instantly whenever things dont look quite “right”
Dava · February 13, 2026
Great test strips
You always hear how test strips aren't as accurate as the liquid tests, but I have not had that experience with Aquarium Co-Op strips. They are fast and accurate. I do wish we didn't need a separate one to measure ammonia, but this one also has GH and KH, so that's nice.