Not sure if this is the right area to post this.
My firefish, Jeff (Goldblum), has been out of sorts recently. He isn't eating and just sits under one of the ledges leaning on the rock (actually resting on it in a way). If he isn't there, he pushes himself into the sand in a corner. He doesn't swim around much at all, but does use his fins to push himself downards into the sand or rockwork. Really at a loss as to what is up with him, any advice is much appreciated.
Both my clowns are perfectly happy and are eating plenty, swimming about and loving life. Snails/shrimp/coral are also good, so I don't think it is a water quality issue?