Thanks again. Looks like that's what it is alright. Thinking about getting rid of the elegance before I have serious problems with the rest of my tank. If it's not already too late that is. What a shame, everything else in my tank is so healthy and I really love this piece.
BTW that isopod is SICK! I think I'd put that in the road and run it over with my truck. lol The mantis shrimp doesn't look like too much fun to play with either.