I brewed a LHBS' recipe called Harvest Moon Oktoberfest. I missed my numbers, only collect like 3.5-3.8 gallons of wort. But that's ok... First AG attempt. The good news is that I made beer and it has alcohol in it. OG was 1.044 (supposed to be 1.054) and I'm sitting about 1.011 (predicted FG of 1.010) so I'm about to bottle, probably next weekend. But this is where I get a little bit concerned. In my mash tun I used a zinc plated washer. When I removed the grain after a 75 minute mash and batch sparge, I noticed it looked almost tarnished/rusted. I could scrape off the brown deposit and the original silver color would show. Have I poisoned my wort and inevitably destroyed/wasted over three and a half gallons of beers? Or should I bottle, drink a couple and see if I die?
Thank you... Chester.