Where did you get the bottles or what was originally in them? I've browsed the local groceries in San Francisco looking for "good bottles" like the ones you have in your photo but didn't see much.
Thanks doug. Do you actually use this when carbonating? I found another thread where people were discussing a flow rate controller but didn't look like anyone was suggesting it.
https://www.homebrewtalk.com/threads/co2-flow-meter.698688/
I'd be happy to play with one if someone vouches for...
Makes sense and thanks for explaining so well.
Next question is has anyone automated in in-line regulator that slowing increases the pressure to a set point?
https://www.kegland.com.au/products/duotight-inline-in-line-regulator-with-integrated-gauge-for-water-or-gas-8mm-5-16-push-in
Why do you need to slowly increase the pressure every 2 hours in step functions starting around 6 psi? Why not just set the initial pressure going into the stone at the desired pressure + wetting pressure?