The aquarium was developed in 1850 by robert warrington.
A specific aquarium or do you mean like a fish tank in people's homes?
In home. For Fishkeeping, people that like to keep fish in home aquarium's
OH!  My daughter has 2 freshwater tanks.  My dad had saltwater when I was growing up.  It can get expensive.
Had no idea they had both fresh and saltwater aquariums.
Yes, but saltwater fish are MUCH more expensive to buy and they seem to be a bit less hardy.
Tropical fish
Tropical fish are generally those fish found in aquatic tropical environments around the world, including both freshwater and saltwater species. Fishkeepers often keep tropical fish in freshwater and saltwater aquariums. The term "tropical fish" is not a taxonomic group, but rather is a general term for fish found in such environments, particularly those kept in aquariums.
Aquarium fish.
Tropical fish is a term commonly used to refer to fish that are kept in heated aquariums. Freshwater tropical fish are more commonly kept than saltwater tropical
Aquarium Fish International
"Aquarium Fish International" (AFI) was a North American monthly magazine, published by BowTie Inc. of Irvine, California, and dedicated to freshwater and saltwater fishkeeping and the aquarium/fishkeeping hobby in general. 
History.
Originally titled "Aquarium Fish Magazine" (AFM), the first issue of the magazine was in October 1988. The title of the publication changed slightly beginning with the February 2007 issue; the new title was "Aquarium Fish International". It had a circulation of 31,170