Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not accurate

A couple of my fish (koi) died because these strips have been telling me my water perimeter was good. Of course I don't blame these strips for killing my fish but had it told me the truth, I could have done something to save them. the only reason I found out these weren't accurate was when I started noticing that strip after strip, despite the water looking very different each time, it told me the same thing! When I went out to get a proper kit, it told me different!!! I would get into details how I found it inaccurate but I'd rather skip that and just tell you to look elsewhere.Do yourself and your fish a huge favor and buy a proper kit.