I keep it at 1.010-1.012 for a full reef, lots of corals, inverts and fish. Never any problems. When you hyposalinty oxygen levels increase absolutely no disease, everything eats very well. Never had anything die due to it. Acclimation times are much longer on the drip. Double the drip time, half the drip rate.
I know what people are saying, I'm nuts.....but **** it works. 25 years and counting.....
I'm not saying you are nuts but I sure won't run a reef on constant hyposalinity. To each their own.