These are nice fish but the prefer schooling so once you add in a few not sure if their requirements would be met in a small tank. Who knows you might be able to pull it off just as long as you do your water changes and doesn't overload the tank's filter. Either way most small fish such as what you choosed will do fine. I was tempted to get one of these myself but decided to put it off for another time. Good luck with the project, i'm sure HC is going to look great.
or blue eyed rainbowfish