I'll definitely get a sw tank at some point, I don't think my parents are gonna be on bored with a 4th tank lol, my betta in my betta tank is very old, so when ny betta passes ill covert that tank into a goby tank or smth, bcs its only 5 gallons. I could convert my 20 gallon but I have lots of fish in there and I don't want to give them away, my other tanks a brackish crab tank and that tank tiny, so I think the 5 gallons my best bet. Sorry for intruding your thread, everyone just ignore that.You need one mines only 29gallon easy setup. Mine was relatively cheap to set up. Most expensive thing was a light for corals and I bought an AI Prime 16HD from someone on here with a mount for like $150 shipped. If you look for deals you can set one up relatively cheap. Bot as cheap as a freshwater but about the same as a freshwater planted tank.