I have a pair of oscars with my 12 inch silver(first arrowana ever since August) and was wondering if they'll be okay together. We've gotten the oscars when they were really small and now they're huge. That was only....about four months ago and they have gone from 3-4(?) inches long to six inch monsters. No real fight had broken out, but occasional the silver would get spooked around feeding time when they get all excite and stuff. Should we separate them or will it be okay?