Thanks for the info there viper. Yeah the tank took a whole bag. It didn't fill it quite all the way but as you probally know the husks are pretty big chunks about 1/2 inch so its a 1/2 to 3/4inch filled in the tank. I was wondering where to probe it good idea to have it on the pad itself. He only burrowed when we first put him in tank and burrowed all through the husk exploring. Personal worry here. If it burned my finger then I figured it would be a problem.