I'm maintaining 6 juvenile discus in a planted growout tank (fish sizes - 2 & 1/2" to 3 " & 1/2"). Fish doing well & growing nicely. Everything OK for first 2-3 months, until a red melon grew larger/ faster than the others & has become a dominating "bully", chasing all others incessantly & no doubt creating stress - although no real damage appears to be being done. Any good suggestions on steps that could be taken to alter this behavior ?