Hey There! Congrats on your new fish! I have one and I love him!!! Great fish! I feed mine frozen brineshrimp and bloodworms...like swimfins, I dissolve mine in a cup of water first and pour it right above him so it sinks to where he's at.
Make sure you SEE him eat. I lost one because of that...just starved poor thing, tried everything, but nothing :sad:
Target feeding is a good idea, especially right in the begining.
Mine didn't care for dry or prepared foods....most wont touch anything except for live or frozen foods...but there's always the one exception lol

:
Also keep in mind they are sensitive to water quality and also don't like to have their tank redocorated and moved around...they tend to stress out very easily when everything is changed around on them.
Hopefully you get that 55 gallon sooner than later. They can be territorial, mostly to their own kind, but if there's not enough hiding places etc he will harrass the other fish....he may also be a target to get picked on himself if he's on the smaller more timid side.
Best of luck and keep us posted on how he does!!!
You picked an awesome fish!!! :clap:
Candice