I have some red slime growing in my refugium. The water circulation is low there. The rest of tank looks great. Water quality looks good. Extra junk and low circulation are likely culprits. Increasing water flow thru the refugium is not an option. Would a small power head help or would it chew up the little critters that are living there. Cheato is the main algea in the refugium. Some hair algea will grow but I pull it out and feed it to the tanks in the tank. Any suggestions on what I can do to improve the situation?