I have a 2-2.5G vase that I used a while back for a betta and it's been empty for quite a while and have some extra sand and an air pump and air stone and want to put something in it. It's about a foot and a half tall. Is there anything besides a betta that would do well without a heater and filter? I can put it in a place that it will stay at about 70-72degrees. How big do comet gold fish get? Would one or two of those be good? Thanks.
-Josh
-Josh