How do you insure that the reading you getting is accurate.I agree with Acro. Ever since i invested in the Hanna Salinity & temp checker i have better control of the tanks i'm running. Now i'm slowly adjusting salinity due to the differences in the prior refractometers i was using before.
Ok bottle that some time and some exspierence and I'll take bottle of eachMy water is 1 million $ per gallon...
I give away my saltwater all the time.
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