Meter works as advertised. I've only been using it for a few days. Make sure to rinse the sensors thoroughly before placing them in the aquarium, mine came with a protective slime on them from the factory (follow instructions). I would also order a separate set of calibration solutions, the meter only comes with 7pH, you need both 7pH and 4 solutions for a proper calibration. I'm a bit worried about the reliability based on some of the other reviews but for now it does the job so I'm happy with it. (However, it would be nice if the meter came with a 4pH calibration solution.) FYI, there are several models of this meter, some of which do not have output relays to toggle them on and off. Read the description carefully.
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