gymnotorax tile

hi idk how to post on a forum even tho I've been lurking for years but I think I'm doing this right lol. I was wondering if anyone had any advice about stockign my 20g long? Its a long story but I basically bought it bc it fits on my metal shelving unit perfectly so there will be no bowing. It...

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.