I have had a mandarin dragnet for about 6months now, but he has suddenly become very skinny. I have a 75 gallon tank that has a few soft corals, about 45 pounds of live rock, and a 20 gallon sump. In my sump I have a marine algae that freely floats around. Would it be bad for my tank if I let some of this algae to float around in the main tank? It seems that lots of copapods are swarming in this algae and I was just wondering if it would help my tank to introduce some of this algea for a while?