Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Extremely inaccurate, please avoid this!

I have been using this for about a week and comparing it against my API Master Test Kit and here are the results I got.I have a 10 gallon tropical freshwater tank, a 8 gallon shrimp tank and a small betta fish tank.All of the them are cycled and controlling the parameters are important for the shrimp tank.I got this for the convenience vs liquid test kits, which are known to be more accurateThere was well over 1 year till the expiry date but I have found the test strips to be inaccurate.Tetra test strips vs. API master test kitNitrate(ppm): 30 vs 80Nitrite(ppm): 0 vs 0GH(ppm): ~75 vs 80KH(ppm): ~60 vs 120pH: ~6.6 vs 8.0The parameters that way off are Nitrate, KH, pH and also Chlorine.I do not have a Cl test kit but there is no way my tap water has 0ppm of Cl. I smell it myself in a bath.Bottom line: extremely inaccurate.