after clearing up a white spot problem up a few weeks ago,1 of my gold rams now looks like its ill,the 1 that is ill,looks like its lost weight around its face,and is having rapid gill movement ,i have another ram in the tank and is fine with weight and everything,but the 1 that looks ill is also swimming a bit strange,could i have parasites in my tank?.there are no signs of white spot and my ammonia is 0