Background: I have a established 100G community tank of 3 years. 6 months ago I bought a pair of Pink Gouramis one died in quarentine tank. First time I've owned Gouramis.The currently tank is stocked with two Koi Angel's,4 YoYo loaches, 1 Senegalese Bicher (1 year old) 1 clown pleco, 1 high fin spotted pleco,1 Green spotted silver dollar, 1 red fin Silver Dollar, 1 Black Knife fish, 2 pictus catfish. I added the Gourami and it was great for about 5 months till it sized up a bit the he wont leave the silver dollars alone. The Angel's will team up and fight back but the silver dollars are always on the run. Its beyond food aggression. Is there a technique to calm this or am I destined to have another tank for him ? I am pushing the limits of how many tanks I can keep right now but the pink Gourami is a beautiful fish to watch when hes not in a hole mode. Just looking for advice on what can be done.