I had a living 50 gallon saltwater tank for the better part of 5 years. Once I got it up and running it was very easy to maintain and beautiful to look at. However, you have to be very picky about your fish. I made the mistake of getting one from a shady store that infected and wiped out my entire tank. I was heartbroken, so after that I packed it up and put it away for a few years. I'm thinking about getting it back out again, but smaller and probably freshwater.