Changes

Richard Preiss from [[Escarpment Laboratories]] reported better agar results when limiting autoclave times to 15 minutes for recipes that include copper-containing ingredients <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/2874530432575152/?comment_id=2874872599207602&reply_comment_id=2874886849206177&comment_tracking=%7B%22tn%22%3A%22R%22%7D Richard Preiss. Milk The Funk facebook Facebook group thread about making agar. 08/27/2019.]</ref>.