Well you didn't post your entire stock list! are you sure that it was the gg you didn't mention seeing it. Giant gouramis can be pretty aggressive but I don't know about that size. I have one about 4" and it's really not that agro... Sorry to hear man, was your aro all messed up when you put it in? your fish might have spotted that it was injured and thats what sparked the attack on it...skylar69;1070100; said:gg was 6.5", aro was 6", and i did what u said, i put the aro in the bigger tank. i guess it wasn't 4 the best.