WHITECJ2OW;3231459; said:except silver aros come from calm waters and im pretty sure constant swimming will cause stress.
They come from the Amazon River, which flows very quickly at some points and slowly at others. I'm sure they can handle both. However, I don't see any reason to put a fish in a pond that's too small, and then add waterflow to give him something to swim against. By that time, you should just buy a bigger pond.