Yeah I've tried probiotic a few times from SBO to other lacto/bifidus ones.
I was mainly talking about prebiotics, which are the foods that feed our good gut bacteria, such as resistant starch, fruit pectin, oligosaccharides, mucins, gums and inulin. I'm also taking the Prescript Assist probiotic these days, and I eat some probiotic foods.
I also didn't get any benefit from ghee when I tried it, and that and heated EVCO made me nauseous. I ended up throwing them out. I found butter and centrifuged coconut oil to be far superior, with no noticeable negative effects, though I don't notice much benefit from them either, and of course, lots of folks here warn against eating butter and some purists warn against even centrifuged coconut oil because it's "processed."
Fecal transplant is a promising treatment for the future. Doing it on one's own risks getting pathogens from someone, so I doubt I'll try that, at least not as long as I'm getting improvements from prebiotics (and maybe eventually probiotics).
Let us know how the hookworms go.
There are multiple sources of RS, not just potato starch.