oh and Jelly; be careful adding what you think might disrupt the balance. It may surprise you to know but it isn't the Black Wolf who keeps the golds in check- he's too slow. Actually, it's the Brycon who is quick enough and brave enough that it kicks the Golds when they're being as bit too cheeky. A hoplias might not be fast enough to avoid getting tagged by the Golds when they're in a particularly arsy mood.