hello, I don't know much about fish, i do know that most will eat nematodes as well as maybe copepods but particularly nemarodes or white worms, but can you suggest me a fish species which are small that aggressively eat them of the glass, from the water column etc, considering rasbora,sparkling gourami's or guppies as i have heard these are aggressive insectivores, any other fish that I'm missing that will actively seek them out a devour the them from being seen in the tank.