I would like to try bichirs for the first time and was wondering how many senegals could go in a 30 gal breeder with the dimensions 36in long x 18 in wide x 12 in tall. I figured this would be the perfect tank because of the width. I could also use a 33 gal (48 1/4 x 13 x 13) but i didnt think this would work since they grow 12 in long. Any advice would be appreciated. Thanks in advance!