i have a jd, flowerhorn, and two green terrors....in the last month the flowerhorn has been sick three times and now my flower and jd are covered completley in a white cottony coating looks like they got a bad sunburn and are peeling i don't know what to do my water parameters are good and have been i've tried some different medications can someone help me figure out what is going on? i need help and so do my fish!!!!