I replaced the fake holey rock I had in the tank with more pieces of granite I had laying around. I think it looks much better and the fish seem to enjoy it more too, which is all that really matters.
I do have eggcrate on the bottom of the tank for extra security, but the rockwork really can't be moved at all. The rocks are all stacked on top of one another, (instead of on the substrate), so even if the sand is removed from under them they'll stay in place.reptileguy2727;5086016; said:Is there anything under the substrate and rocks (like eggcrate)? When they start digging more that rockwork is going to move.