Maybe Im trying to much… I have mixed 125 reef tank. For last 5 years Im using Refractometers. There is many different opinions about this. With what to calibrate? RO
water or Refractometer fluid. Recently I found inconsistencies. Ill try to explain it to you. I have 2 Refractometers. 1 4 years old 1 two years old. Two bottles of refractometer fluids. One old and one new ( year old). Problem. When I calibrate with those fluids I have different results in my tank water salinity. 0.024 and 0.026 which tells me fluids are bad ( at least one of them). So i calibrated them with RO
water. Now salinity shows 0.027 on both refractometers. What you guys think? Any help, suggestions? It is really frustrating. I had to add that all is good in my reef.