I have approx. 6 in bamboo shark that I have in my 75 gal tank currently. I know I need a larger home for him. What would be the smallest ideal size? I have an oppurtunity to procure a 220 gal tank which is 72*24*29 is that sufficient, or should I go larger. I have read a bunch of different opinions on sizes of tanks to use for this shark. I am am jut trying to get an appropriate tank that the shark will be happy in.