I would have to disagree very strongly with that. a 40 gallon? are you
serious?a banded cat shark, bamboo shark at the very absolute minimum
should be in a 100 gallon and above tank. most would recommend 125 gal.
and up. these sharks grow to over 3 and a half feet! your 55 gal would be
outgrown very shortly(not to mention water quality issues). I suggest you
do much more research before subjecting the animal to those conditions.