not sure if you know this,but CAEs get huge and will suck the slime coat off fish when there small. when they gte big they suck holes in fishMy white one is kept with just three black neon tetras while my black one is kept with three neon tetras, a golden ram, a balloon ram, two red minor tetra, three glow light tetra and a golden Chinese algae eater. Oh and some pink tetra. I can't remember the name.