Question on Lowering Salinity


New member
Started to lose a bunch of coral and others not looking so great about a month ago. Long story short, I found out that the calibration liquid for my refractometer was way off. I was measuring 1.026 but was actually 1.040. Needless to say it through off just about every compound in the water off.

My question is how much water do I need to change out with RODI in order to drop back to the 1.024-1.025sg range?

I have been doing about 5 gallons a day or so in 1 gallon increments (20 gallons total) and I still show a pretty high sg? Is there a calculator out there I can reference?

Many thanks