An all Cory tank? Lol!
this list goes unrealistic to realistic:
15,000G indoor
koi pond with full length window
10,000G 50 male pearl gourami, 100-150 females, at least 500 corries of all different varieties, and several hundred tetras of various types.
5,000 gallon fancy goldfish aquarium
3,000 gallon 5 ft tall angelfish tank, with tetras and sterbaI cory
2,000 gallon Livebearer tank
1,000 gallon barb tank
500 gallon fahaka puffer tank
200 gallon warm water community with several pairs of different
German rams along with rummynose tetras and sterbaI corries
100 gallon pea puffer tank
75 gallon HEAVILY planted endler tank
75 gallon betta sorority