I recently purchased 2 new polys and now I have a problem. I see small white worm looking creatures on them. They are no longer than 2 mm. I have seen some minor scratching from a couple of my fish. The tank is a 150gallon planted tank. Other than the minor scratching and the visible wormlike things there are no other symptoms. Any ideas? I have researched and have narrowed it down to either anchor worms or flukes. Any help would be greatly appreciated. I don't want to just dump medication into my tank without being educated.