The thing about salt water is that the upkeep is more expensive, and usually the fish are also. If you take the chance and don't have an extra tank for quaratine, and you just put a new fish in your tank...and it brings in something you can lose your whole tank of fish... My parents had a salt water for awhile years ago...so cool. I was always afraid to try it, so I always just had tropicals, biggest tank I had was an 80 gallon. I wish I still had it at times....