So my 60gallon tank is a healthy and well-filtered tank and free of ick or any kinds of internal parasites, but I have been noticing very little white dots that look like worms, that stick on the front of the glass and move around and in the water as well. Are they harmful? I don't know if high temperature and aquarium salt could fix this, but when my jack dempseys previously had ick I treated the tank and it was all gone but now these have appeared. Any help would be greatly appreciated. Thanks!