OK as for the red coris wrasse/clam issue. The wrasse came from a friends tank. From there it went into another friends sump for a while before I could get it. The only problem that the first owner had with him, and me too, is that they can move rocks about three times their size. They do this looking for food. Other than that, he's been a model citizen.
Some of this is due, I think, in my pholosophy (sp) of how I maintain my tanks. I keep my fish well fed in the belief that if they know who's feeding them and they get plenty of food, they won't go around looking for food elsewhere, ie corals and clams. This has seemed to work for me for 7+ years as I've never had any of my fish bother any of my corals. Knock on wood!
The down side to this, for some anyways is the excess nutrients in the tank that have to be delt with. But it works for me. I have a ton of small sponges and musscles that came in as hitch hickers and they are doing well feeding on the extra nutrients in the water.
drives300,
The biggets problem with a hex is trying to set up you equipment. Ever try making a sump for a hex stand? I did once. As for my tank, I keep it very simple. HOB prizm skimmer, LR, LS, a few well hidden powerheads, heater, and lights.
The second biggest problem is aquascaping in that you can potentily have 5 sides to view from. Mine is set up with rock on 2 1/2 sides in a simi-circle. I like teh way it has turned out. Over the years, I've tried several different ways, from this to a basically V pointing out from the back wall.
Third is trying to find hoods/lights for the tank. I made my own canopy, bought a Jebo 4 X 55W PC setup and disassembled it so that I could use the ballast, lights, and reflector. I have since added in the 175W Mh bulb and converted the PC to all atinic bulbs. It's a tight fit in the hood but it works and I now have my first SPS coral and clam in the tank. The tanks are different, but can be fun to work with.
KRP,
The bubble has a skeleton that is in a U shape that if streached out would be about 10" long. When he was fully open in the tank, he was about a 12" across ball. Last night I moved him out and into my 400G tank to give him more room to grow. When I removed him, he weighed about 10 pounds. I also noticed that his skeleton is starting ro grow outwards from the U, kind of like an umbrella opening. It will be interesting to see how that develops not that he has more room. I've had him going on 7 years now.