I sent my water samples to ATI two weeks ago. I just received my results. Most parameters were where I thought they should be. Except salinity. ATI is showing my salinity at 31.27 PSU, which is very low. I check my salinity weekly with a BRS refractometer. The refractometer is calibrated at least monthly with BRS Refracto Juice. I just calibrated it this morning after receiving the results, and my tank's water is still showing at 35ppm.
So either my refractometer is faulty and BRS's Refracto Juice is not at the 35 it claims, or ATI is wrong.
I'm using Instant Ocean Reef Crystals salt. I mix it at their recommended 1/2 per 5 gallons.
I'm not really sure where to go from here, other than bringing a water sample to my LFS to be tested.
So either my refractometer is faulty and BRS's Refracto Juice is not at the 35 it claims, or ATI is wrong.
I'm using Instant Ocean Reef Crystals salt. I mix it at their recommended 1/2 per 5 gallons.
I'm not really sure where to go from here, other than bringing a water sample to my LFS to be tested.