Personally, because of the size the banded's get, I would recommend either a 30 gal. long or even better a 40 gal. breeder. With these tanks I would go with a substantial amount of liverock, a macroalgae biotop, and a somewhat deep sandbed. Regular filtration should be fine, and suffecient enough lighting to keep the algae alive is a must. You are not limited just to bandeds and dragonface you could also get away with a pair of bluestripe's or multibandeds if you like.