So, the last few months I have been working about 18 hours a day, 6 days a week. I was doing pretty much the bare minimum to keep the tank going. Sing by the house in the middle of the day, throw some food in, and back to work. Get home at 1 AM, top off the water, go to bed. Water change saturday mornings, then back to work. I ended up missing a water change, so the next weekend, I got home late that friday and decided to go ahead and do one. I drained 50 gallons, and then added new water. Sunday, I went to feed the fish and top off the tank, and my tub of RODI that I had just made, was EMPTY... and my tub of salt water was still full. I did a 25% water change with fresh water!!! I keep my tank at 1.026, and it was way down. Most corals are are still doing fine (2 weeks later) with exception to the pink carnation (which is pretty much toast), my welso is shrunk up pretty bad, and about 1/4 of one of my hammer corals (the wall type) is looking grim. Hard work may pay off, but the side-effects of hard work can surely take their toll.