That's exactly the kind of detailed answer I needed Tom. I never quite understood why in his book or .biz website how 'magicly' it didn't matter how deep the bath and why the sudden jump to 20 drops in only 2oz bottle seemed rather excessive by comparison.
Thank you so much!
My partner has got to 14 drops internally today and experiencing a load of gas so had already started to reintroduce probiotics and psylium. I guess it should be like handling Antibiotics . The jury is definitely out as to whether I will ingest it!
I'll look through some historical posts and see more about that particular issue.