Don't know if this is the right forum for this, but it doesn't seem to be an emergency. I have a 2 1/2 foot tank, and it has a couple of Moonlight Gouramis in it (along with other fish). I have a bit of slate leaning against the back of the tank as part of the decorations, and I have recently noticed that one of my gouramis is staying behind there a lot. It also seems to be breathing very fast, at least compared to the other fish it is. Is this normal?