amazing what an inch can do isn't it? of course, depending on the surface area of the tank, and inch can be a few gallons. if my 75 drops an inch, thats almost 4 gallons. inch and a half and I've already lost 6. If a tank is at its bio load limit, that really matters. just curious-where in hawaii are you? I lived on oahu for 5 years and miss it like crazy!MistirE;740892; said:just an inch did this