I use eco thrive charge which is mealworm Frass and I love it. The plants seem to love it too, I mix mine with granular mycorrhizae and use that to top dress. I also use it when transplanting, I brewed it in a tea once with ewc and some other bits but I didn’t check it with a microscope or anything, but my unhealthy dried out plants bounced back quick snap after a the tea and foliar feed (kelp and aloe)