Couldn't resist a cute feeder goldfish when I went to the store this weekend. It's white with a red cap and a red spot on either side of its tail. It's in a 4 gal filtered tank right now, and I know it will outgrow the tank quickly, but I'm hoping to wait to set it up in my 20+ gal later on. I still need a stand for that tank and I don't have room for it right now. Anyway, the goldfish is about 1" right now. I know they are big eaters/poopers, so would a 50% water change weekly be a good idea? Do they develop personalities like bettas do or are they just kind of ornamental fish? What bottom feeders/algae eaters can be kept with goldfish if I don't install a heater in my tank? I'm keeping my fingers crossed that actually buying a feeder fish and hoping it will live will not guarantee it will die....