I originally posted about this stuff a while back (http://www.3reef.com/forums/algae/what-fish-invert-will-eat-algae-109577.html) and was advised to try some emerald crabs. They immediately started chowing down on the stuff but slipped in to the rocks within a few minutes and haven't been seen since. If they are still alive, they aren't even making a dent, so I need to do something else. I spent a few hours picking as much out as I could last week, siphoned it all out and now its back and the leaves are just as big or bigger. I've been running a BRS reactor with GFO for the last three weeks. My nitrates are also down to 0 and my Chaeto is also starting to grow like crazy again. I don't really have any other kinds of algae problems. Will anything eat this?? It would make quite a feast for something. =) My tank is only 46 gal, so no tangs. How about a lawnmower blenny?? Mag 1300 Calcium 450 Alk 2.4ppm Ammonia 0 Nitrite 0 Nitrate 0 P04 0 (all stuck in this algae I'm sure) RO/DI Water 0 TDS p.s who knew the iphone would take a better picture of this stuff than my other camera??