I need some help. I have a 65 gallon tank about 9 months now. Recently I have this red substance that looks like velvet all over the live rock. I try to remove it but it seems that when it hits the air it turns to liquid. No matter haow many times I remove it, it comes back. I have about 30 pounds of live rock in the tank. The fish do not seem to be affected. How do I get ris of it? someone suggested a skimmer and some more critters that will clean it?