I've had the leopard bush fish for maybe 2 years and would hate to have to give away but I don't want to do the wrong thing and keep the fish in a smaller tank than needed...I read some places online that a 50 gallon minimum is required which means it has the same footprint ( 36" x 18") as a 40 breeder, it's just slightly taller. Please tell me it's okay to keep the fish in a 40 breeder?