The substrate is just gravel, like in fish tanks. they have a log and about 6 fake plants. I feed them everynight at 7 or 8pm and everyone eats fine. I usually dont put more then 10 crickets into the tank for one night. Fatty eats the most out of all of them and the others just catch was goes by. It could be possible that Shorty is eating the others eggs but I've never seen eggs in there before to eat, unless it happens in the dead of the night which could be possible. I don't know.