I love how super easy it is! The case was a bonus. I had no problems with packaging or delivery time. Right before I bought this I made the mistake of listening to the guy at the aquarium store. He sold me this little stick in the aquarium, a salinity tester. It looked like the one with the "hand". In any case, this thing didn't stick to the tank and didn't give me an accurate reading. This helped acclimatize my sailing mollies to my aquarium's salinity but was useless for accurate measurements. It was really just used to see that the levels of the two are the same. Anyway, the day I got the refractometer I was using a different controller and this one. there was a difference of 0.005 between them and of course the refractometer was the most accurate of the two. I shouldn't have wasted my time with anyone else. Save yourself the hassle and buy one of these right away.
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