i didn't have any problem calibrating my refractometer. am i missing something? i'd be interested in the article you mentioned.

It Goes in at 1.023 but in a 5G it ends up at 1.025 with evaporation.

I mix the water for a SG of 1.024 but it ranges from 1.024 to 1.025 in the tanks.

mine is usually .025 reef / fish tank

1.024 to 1.025 It seems to vary from time to time. Try to keep it at 1.025

1.026 for me. :)

DITTO.:wink:

I make sure i wash my hydrometer in fresh water after every use, and never had a problem with it

My target is to float my hydrometer at 1.025...but that hydrometer is calibrated to 60 degrees F, so my actual SpG isn't really 1.025. I would have to consult my conversion chart....