I made apple cider vinegar, but it didn't turn brown?
My first batch DID turn brown.
The first batch I let apples rise to top of fluid, left 2" o f air and used cheese cloth. The second batch I kept apples submerged, and left no air in jar and covered with coffee filter.
Was the issue not enough air left in jar.
Recipe here: https://sites.google.com/site/pstorli/home/permaculture