hey guys, ive got some sort of brown algea growing on my tank walls, unseeded base rock ( it seems to stay off my live rock ) and sand:grumble:. its easy enough to cleen it off my tank walls, and it will rub off my base rock easily enough but does anyone know what the best critter is to get rid of this neusance. i have a few blue legged hermit crabs but they dont seem to touch it:question: any advice will be greatly appreciated. thanks