Well, I don't know which type of worm is in the highest numbers, but I've seen roundworms, Tapeworm pieces, and flukes. I suspect the roundworms are the hardiest because I rarely kill any of them, the ones that seem to leave the easiest are the flukes. I've just been taking various homemade herb teas, things like hyssop, male fern, poke root, clove, thyme, sage, and tansey.