@ uncommonsense. I think sewer water would have been an upgrade.
I use starsan and as I mentioned have never had a problem before. This one was the perfect storm of bad luck/complacency/poor technique on my part. I am kicking myself for that. I was gearing up for the holiday season and brewed 4 batches in 4 weeks; two 10 gallon and two 5 gallon batches. When I am brewing heavily, I usually will save my starsan solution for 2-3 brew sessions before swapping it out. This time I stretched it a little further than normal – big mistake. On my second 10 gallon batch, an IPA, I split it into 3 secondary carboys for dry hopping. This is when things started to turn bad. When bottling this third batch I was running out of bottles and decided to use some of the bottles from the brew on premises beer. As I mentioned I had about 100 of these bottles that I had received from coworkers. They were the last bottles immersed into the starsan solution on this day of bottling. As a side note, I used bottles from this group in an earlier brew session with no problems. They had been thoroughly washed and sanitized, or so I thought. Now everything that was sanitized prior to the infected bottles was/is fine, but everything after that is not. I bottled a second batch two weeks ago and I sampled that last night. It is also starting to turn. My final frustration was contaminating my primary while taking a hydro sample. Everything looked great while taking the sample, but I used the contaminated starsan to sanitize the thief. I went to transfer the beer last weekend and found a nice pellicle on the top of my beer.
So now it’s time to replace my lines, replace my buckets, the old starsan was gone a while ago, then wash and sanitize everything else like crazy. Unfortunately, this means reduced inventory for the holiday season and I will ramp up more slowly (1 batch per month) until I am sure I have eradicated this bug from my setup.
Hopefully Santa will bring me some new equipment in a few weeks.