I've noticed, or at least I think I see, a lot of little white worms in my tank stuck to the glass moving. I am really worried about this and 4 my fish, Lebron. Are these little things harmless or R they health-threatening 2 my fish? He is the only one there, and has no fishy friends or live plants. He still seems 2 be active & flares at EVERYTHING. He eats well and is very alert. When I checked really close they r like SO microscopic that U have 2 stay there 4 a while 2 make sure that they're moving. They r seriously everywhere!!! How can I stop them from multiplying? I really don't want 2 lose my fish from something that could be cured. If u know the problem and solution, PLZ tell me.