he will get in the holes, i got one for my Brb which is just over two feet long and he got inside the main body and wrapped himself around the pump! there is also a big hole to put the fogger into and my Brb fit into that too.... fortunately it had no water in, i had the sense to test it first which was lucky because the way it is put togeather, i couldnt take it apart to get him out without crushing him!!! i filled that with pebbles and it was fine from then on, but id wait until he's bigger. and on the plus side they look great in a nice set up.