I'd like a school of mid-level swimmers to add movement to my tank but run into that little issue of most nice looking schooling fish being bite-sized to my oscar, like my 20 columbian tetras I know silver dollars are a popular choice, but I'm not a particularly big fan of their coloration. I find silver fish (ie: tinfoil barbs, silver dollars, etc.) to be a bit boring. So, does anyone have any suggestions for an alternative schooling fish that is large enough to not be eaten, but has a more interesting color pattern than the silver?