So I bought this but still hesitated even when I pressed to order. I wanted to be able to read the oxygen content in my aquarium. I've noticed that these things cost a lot of money and I don't understand why. I decided to give it a try but it came up with a slightly ajar liquid solution, messed up the instructions and ended up on the band-aid holding it in the box. I decided it wasn't even worth figuring out how to use and that I would just get my $100 back.
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