I can get a 15 gallon, food-grade HDPE barrel for a few dollars. I’ve been thinking of doing a solera, but don’t want to deal with the expense and maintenance of a barrel. Plus, 15 gallons is exactly the size I had in mind.
I know there are plenty of people that will say HDPE will let in too much O2, but I’d like some insight from the collective experience and to perhaps get some ideas. So I guess I’m looking for opinions on
1. Has anyone ever done this with HDPE, and
2. Is there a way to reduce O2 permeability of the HDPE to make this barrel suitable.