I plan on keeping it in a 55 gal, sg around 1.005-1.015. I'd love to keep a few knight gobies or even a puffer with it, but I'm not sure if they'd get along. I've read some horror stories of morays trying to eat puffed puffer fish and both dying.
I've only had these 2 for a week and night is the only time they really come out. I even have to feed in dim lightThey get big but literally lay there all day. They are pretty active at night though, I used to see mine swimming everywhere at like 3am