AquaChek 641426E Nitrate/Nitrite Test Strip

I use this for testing nitrates and nitrites in freshwater aquariums and ponds. It it accurate, easy to use and affordable. Works great!!!

Use these routinely for quick checks on the performance of our wastewater treatment facility.

works as expected

did not come with a chart/guide with range for results on color stick!!!

I bought this bottle of test strips to find out if the color strip scale matched another manufacturer's strips. The other strips are sold in larger bottles at double the price, so had this matched, it would have been a good option. Unfortunately it didn't. I'm slamming the manufacturer and vendors with my low rating because they fail to provide the reading scale anywhere on their web site, forcing me to buy a bottle to find out it won't work for me. They could easily do that, but stubbornly refuse to do so.In case anyone needs to know, the Nitrate scale is 0 1 2 5 10 20 50For nitrite it's 0 0.15 0.3 1.0 1.5 3.0