Well for there protection and my enjoyment.. i tore the driftwood wannabe piece down to the end where they couldnt hide... My only consern was when they get bigger they wont be able to get out without tearing eachother appart.. there were 2 of them that were in it.. when i drained the water out they didnt come out if this tells you how badly they were lodged in... so yeah they are out and about...pissed as **** at me.. but what can you do right? lol