I'm contemplating getting a fancy goldfish and I have a few questions. =) My first question is do they "need" a buddy? Or will one do just fine on it's own? I only have a 14 gallon tank to devote to goldfish-ness which I know is possibly stretching it for one, so I can't really get 2, I'm pretty sure... I have my tropical fish in my 30 gallon so that's a no go. Do they do fine with sand as the tank substrate? I'm considering changing it to gravel since I have some white gravel (I also have black...I might mix them) and since I'm planning to get one of those double tailed, calico ones, that might look super cool... But is sand better/ok? What kind of food is the best? If the room that the goldfish will be in stays a pretty solid 64 degrees all the time, do I need to continue to keep a heater in the tank? Set to 69 or whatever the lowest setting is? Do fancy goldfish do better with more swimming room or more mental engagement? I have this really awesome tree root thing that takes up a good portion of the tank and I'm not sure if I should leave that in... There's swimming room to one side of it and through the roots and stuff but, yknow... Will it eat my Java moss? What about the java ferns that I have in that tank? Thanks!