Recommended Hydrometer

[mark]

Does anyone find any drift between the hydrometer and refractometer or is the error consistent?

[fishguyxd]

I have a reading of about 1.025 hydrometer with tank temp of 80.5 F with lights on and 79.1 lights out
so what does this work out to based on the calibration and a refract.

[SeaHorse_Fanatic]

When we tested a friend's hydrometers, they were all off by quite a bit so it's hard to say without a straight comparison using both instruments how to calibrate your hydrometer. If you don't want to buy a refracto for now, best bet may be to borrow one from a friend & calibrate your hydrometer at home.