Hydrometer

[craigwmiller]

Originally Posted by Madreefer

I used one for years. When I finally bought a refractometer I compared the two and it was bang on. Lucky I guess.

Hit and miss, but they don't seem to drift in my experience. I had one that was bang on, and another that was off by about 3ppt (but was consistently off). I also had a refract that would drift from week to week to day to day (3-5ppt swings), and another refract that was dead on for months at a time (which I still use today )

Originally Posted by htfn

I never compare with the other but I never have any issue I think....
My fish and coral are fine for a long time. If I need new one what is your recommend? They seem to be all same price range except digital? one.

I think at the end of the day you inferred the KEY to this whole thing, consistency. Unless you are unlucky to get a meter that drifts all around, you are likely OKAY so long as what you are doing stays the same