Mine is going in a 40gb. I know, it's small, but I have been keeping my pod pop. up and it will be trained on frozen, so it should work. I am even taking some risks by adding some stinging LPS. But I figure if I put them in place then would be had to reach for the pipefish, he should be safe. Dragonfaces don't swim, they slither, so if I put it in a place it can't slither to, I should be fine. But, you never know.