We'd love to see some pics of that tank. Four 2-foot GG's in a 220 would be quite the sight, even after they killed the Aro!Sorry for your loss years back I had 4 in a 220 that were pushing the 2 foot mark the gg's got along fine killed my silver aro though
Could maybe have introduced a handful of Oscars to act as dithers and reduce aggression?