I have kept freshwater fish since I was 10. I am now 32 and currently have a 44 gallon community tank, a 10 gallon community, a 10 gallon all girl betta a 5 gallon single female Betta with 3 cory cats, and a 2.5 gallon Male betta tank. I purchased a 20 gallon tall tank this weekend at a yard sale and I am looking for someone to tell me all I need to know about keeping salt water. Id it harder than fresh? I have talked to a guy at the LFS who seems to really knows his stuff and he has suggested if I decide to step over to the saltwater side to get live sand and rocks that they sale to start with and then add some soft coral when I feel like I am ready. He showed me several types that were really pretty and he said easy to keep. He also suggested Goby fish as a good first fish so tell me all you can about them to. Oh and he said they sale premixed/cycled saltwater for .70 a gallon and he said that would also be a good idea. Sorry its kind of long and thank you for any help you guys can give me.