Lmfao. when you start counting the 1.5g "tanks" we start counting the gallon pickle jars laying around the house. After all, some of the large scale betta breeders keep single specimens housed in half or one gallon jars.
1 70gal marine reef
2 70 gal mayan cichlid
3 55gal cichlid+tropical
4 30gal marine
5 20gal african sidenecked turtle (white variety)
6 5 gal (fry tank)
7 5 gal (tropical)
8 fighter
+ huge koi pond with some 18+ year old fish and many many younger (3' ghost koi called fatty )