I don't have more aquariums than that/those described above.
Main Tank - 55g with four white cloud mountain minnows, five peppered cory catfish (occasionally treated with frozen bloodworms), and three ghost shrimp. HOB filter is a Top Fin 75, fully cycled. Air supply is a dual-output air pump, with the two lines connected with a T-valve into one airstone block. Not planted, but has five artificial decoration plants.