For some reason my chaeto isn't growing (or if it is its extremely slow). I've had my refugium up and running for about a month now.I use a CFL bulb with a rating of 5100k about 4 inches above the water. The fuge has flow that allows the chaeto to tumble. Instead of the chaeto growing there is a browinish algae that has been growing on the walls and floor at a steady pace.. Im not sure what i'm doing wrong here. Any pointers or advice will be greatly appreciated. Thanks!