hi i bought two snakeskin gouramis about a month ago and over the last week or so one has been chasing and nipping the other one, i cant seperate them as i only have one tank but do need to rehome the one that is being picked on as its fins are beginning to show wear and tear, the gourami is about 3 inches long cant think of any othe solution to this problem and i dont want the fish to suffer.