double_g2k
New Member
How do you calibrate a refractometer? I don't have RO and am saving up for a unit. Should I go buy a gallon and test it? Both the water in my tank and the water in a friends tank are measuring 1.020 and tap water is almost zero for salinity so it SOUNDS like it['s doing its job, but can it stay calibrated forever?
FYI my hydrometer says the SG is 1.025 so boy am I happy I got one of these!
FYI my hydrometer says the SG is 1.025 so boy am I happy I got one of these!