Wow, you'll give up on this forum? Is that some kind of a threat? LOL
If those of us that give freely of our time & knowledge don't answer your questions, you'll stop asking us to give freely of our time and knowledge? That's just silly, eh?
I answered your last concern (I thought very completely & thoroughly, and it took quite a bit of my time). Should I threaten you with not answering your remaining questions because you didn't even take the time to say "thank you for your time"???
--Normally a shower filter does not change water pressure.
--Yes, it DOES make a difference whether tinctures are created with dried powdered herbs or fresh juicy ones. The tinctures made with fresh herbs/roots are always better and more potent.