Ok, after coming home today from the reef store (with a couple of new additions) and I noticed some particulate in the water column. Without going through the whole narrative, I checked the salinty of the water in my tank and it's 1.018!! Now, I just calibrated the refractometer and it was slightly off before this test...so who knows how long it's been bad. \r\n\r\nNow, if its really 1.018 shouldn't my critters be suffering? Thats really low. I'm concerned that my refractometer might just be fracked. \r\n\r\nIf it is really that low how would you suggest ramping it up? I don't want to kill of my invertebrates. \r\n\r\nThanks!