Sep 10, 2019 #21 Reefahholic Acropora Farmer View Badges Reef Squad Excellence Award Joined Sep 5, 2014 Messages 8,121 Reaction score 6,797 Location Houston, TX Rating - 0% 0 0 0 I've always heard to calibrate to 1.025-1.026 because that's were we keep our tanks at. However, I've calibrated with 0 TDS water and get the same results. I have crossed checked with several other refractometers I have laying around.
I've always heard to calibrate to 1.025-1.026 because that's were we keep our tanks at. However, I've calibrated with 0 TDS water and get the same results. I have crossed checked with several other refractometers I have laying around.