They tank is a 29h It's not much space to work with. i understand what you mean about the flow under the rocks, i know you can't see it, but one of my gobies literally cleared a visibile path althe way from one side to the other. i was amazed but in much apreciation because i'm scared to set rocks like that because i'm afraid that they will fall and break my tank. I don't even like hard scrubbing my tank walls in fear of busting it out. i'm just real paranoid w/ the thing though. Thanx guys keep the thoughts coming
jason