HI

I am not sure what the others here have mentioned, but I will say this: every parasite has a bandwidth.  The bandwidth is different for every parasite: some very high, and some very low.  If you have a big earthworm, then you may need a very high frequency to kill it. Also, (like Dusen mentioned) you need  parasite herbs;  along with a diet change and regular moderate exercise.

Hope this helps  ...Ana