First of all, I know that there's unlikely to be anyone here with direct experience in soy sauce - speculation, assumptions, and opinions are all welcome and requested.
I've been searching for a few days on how to make Soy Sauce and have turned up a few results around the web, most notably...
I agree that stainless would be better. Copper was chosen because of the ease of obtaining the materials.
When I have more time, I'm going to look into the concentration of carbonic acid, and may even have some beer that I make with this siphon tested for it's presence. A cursory look on...
I search the forum frequently, but because I am able to find the answers to my questions, I rarely post. That changes today as I reveal:
A solid copper auto-siphon.
It seems that people bring up metal auto-siphons from time-to-time, but either nobody's bothered to make one (except one guy...