hI GUYS ,I've put a small rio power head in the refugium but it has had no effect on the red slim ,I have perfect peramiters on the tank so the only thing that I can asume is that the flow in there still is not sufficent,the only thing that has worked for me in the pass to remove the red slim has ben cutting back the amount of light it gets or useing red slim remover,but I'm relucktant two try these methods because the fuge is a hang on CPR that is recieveing light from 3 400watt MH and the tank is stocked with mostly sps camptive raised frags,also the last time I used red slime remover on my old tank it prduced thousands of bubbles in the tank and took weeks to pass through the system,If any one has any new ideas amount how to handle this please respond thank you ,GGfish