What would be the smallest amount of Gallons needed in a tank to have a succesful salt water tank. I currently have a freshwater tank but love some salt-water species and think the variety is much more pleasing in salt-water. Unfortunately i don't have tons of money to spend on extremely large tank and was wondering what the smallest sized tank i could have with maybe a few invertabrates and one to five good looking fish. Thanks a lot for your you help and suggestions in advance