It's not the size of the fish, it's the attitude.
100
gal: freshwater
2 green kissing gouramis, 1 red tail shark, 3 congo tetras, 3 australian rainbows, 1 rubberlip, 1 hippo, 1 green severum, 1 yellow severum, 2 german blue rams (pair), 3 giant danios, 3 silver dollars, 5 angels, 12 freshwater clams.
30
gal: 6 white mollys, 3 rummy nose, 2 german blue rams (pair), 2 red swordtails, 2 golden swordtails, 1 handicap guppy.
20
gal: fry tank of whatever (right now about 30 guppies and 100 white molly's.
10
gal: 2 german blue rams (pair)
5
gal: Basil the Betta, 2 african dwarf frogs