I bought 2 bottles of these easy strips. They are not really the most accurate, but they are in the ball park and a cheap and easy way to see if you are in the right direction. I hack I discovered to keep the reagent from bleeding off the test strip was to lay a piece of wax paper underneath. I don't recommend these for the Nitrite measurement because it was off, on both bottles. I ended up using the API master test kit and the Nitrite was no where near close. The chlorine pad seemed accurate. I reccomend getting one bottle of Tetra strips and one bottle of API. The API test strips are more accurate but double the price. Save the API strips when you are close to completing your Nitrogen cycle in your new tank.

I’ve used the app for a while now but the app can’t access the camera on my iPhone and there is no way to allow accesss.

I got this as a fast way to check my freshwater aquarium levels. I also was having a major fish crisis at the time. I had to do a large water change. My fish was very stressed but all the levels looked ok, (I only looked at pH, nitrate, and nitrite to be honest and then used the Tetra Ammonia test strip as well) I will list the reading here: pH: 6.8 Nitrate: Very light pink, not quite at the 20 pink it shows on the test card, so I determined this to be less than 20, 10 perhaps. Nitrite: 0 Next day fish still stressed, and I thought, let me use my test tube set just to cross check. I got the following results: pH: 7.0 Nitrate: 20 Nitrite: 2.0 I couldn’t believe it would go so high overnight, but anything is possible. So I thought let me just see what the test strip says. So right after checking with my test tubes, I did a test strip read. The strip readings were as follows: pH: 6.8 Nitrate: 20 Nitrite: 0 I could not believe it picked up no traces of nitrite at all when my test tube result had read so high. These test strips are convenient, and besides the Nitrite seem to be within reasonable range of accuracy. I don’t know if I got a bad batch but I can’t trust them for nitrites now. I will always cross check with my other set. Just wanted to put this out there to help others be aware and maybe help some fish along the way.

I'm disappointed that with all their aquarium experience, Tetra markets the strips with a chart whose color chips are loosened and faded by a drop of water though you must hold the wet test strip near the chart read to your test result.

I've been using these for years getting consistent results. I've noticed that Petco and PetSmart also use these for water testing. I've also tried API test strips, got whacky results and would not recommend them. But, I highly recommend the Tetra Easy Strips.

Don't puck up chlorine and ph is way off! They had me thinking my water hardness was really low about 20 strips in I started removing driftwood adding shells and went to the store down the street and ask the girl in the aquarium department what I could use to raise ph and she said really we have really hi ph so I bought a dropper kit come to find out it was off the chart so high

Everytime I buy these the chart gets wet. Also its very small for my old eyes!!! Please put up printable chart we can print that is bigger to read and I csn laminate. Thank you

Easy to use. Better then using and counting drops in the little vial