My CUC is arriving tomorrow so I'd like to rearrange my rock before all those little critters get in there and potentially get squished. A lot of my rock has pineapple sponges and tube-type feather dusters on it...can they survive out of the water for awhile while rearranging? There's also several bristle worms and amphipods throughout the rocks. I've read that the sponges could be a problem being out of the water, and I personally think that the feather dusters have to be very sensitive, and need to stay submerged but am not sure. It's going to be tough to do if I have to leave the rock in. It's about 85lbs in my 90g tank.