I keep mine at 1.024ish and everything is doing wonderful...corals, fish and everything else. I think what they were worried about was the 0.002 change going to hurt or screw anything up. Everyone likes theirs at different levels, I know one person who keeps it at 1.027 religiously...and others at 1.023. I was just trying to put their mind at ease and let them know that as long as the SG stays in the 1.023-1.027 level, everything should be fine. Just don't make a habbit of bouncing from the lower number to the higher number...try to stay at the same number everytime.