Hmmm... I was under the impression they would only get a couple three inches long... bigger than that? That might even still be cool with only a single one and all the rockwork tied into place so it couldn't be toppled.

The conch is just plain cool to watch, but to be effective right now I'd need at least another couple dozen of them, that'd get epensive in a hurry. I'd like a couple more just to see if I could get lucky and have them reproduce... too bad we're not that lucky else they could help pay for this so called hobby.