When testing these strips with new API liquid test kits for the same parameters, they were as accurate as the liquid. ... These are great for testing in between the times you want to use your liquid kit and is much less of a hassle and mess.

How accurate are API ammonia test strips?

Yes, API AMMONIA TEST STRIPS test solely for ammonia in your aquarium water. Test strips are extremely accurate in showing high ammonia levels – simply compare your results to the precise color charts that come with the product, and take the appropriate actions to correct unsafe parameters for your fish.

Is API nitrite test accurate?

Both api and nitrate-nitrogen test kits are accurate. Just calibrated to measure different readings. There are 4+ some change total nitrates for each nitrate nitrogen.