if my sybon refractometer is calibrated with 35 ppt solution is it posible to still give a false reading.
reason i ask, i bought fish from 2 different sources and there water tested 30 ppt and my water 35 ppt. i called 1 source, said his water is 35. could it be defective. i was going to order a hydrometer.
reason i ask, i bought fish from 2 different sources and there water tested 30 ppt and my water 35 ppt. i called 1 source, said his water is 35. could it be defective. i was going to order a hydrometer.