i have a brown alge problem i want to know what causes this and how to fix it? I have a 3o gal reef tank: coral life compact florecent lite 24" sorry dont know the wattage, fluval 402 canister filter, aquafuge 2 refugium, 10 watt uv sterrlizer, protieen skimmer, live sand live rock, cleaner shrimp, lawn mower blenny, firefish, clarki clown, tons of macro alge in tank and refigum, mushroom polyps, a small polyp collony and three pink tip annomes someone please help in hate the brown alge. all my levels are good ive been testing every day. ive also been doing 1 gallon watter changer every 2-3 three days to see if that would help but just cant seem to shake it im in dire need