Originally Posted by incutrav
They are def. pits, and they only appeared after i let the carboy soak upsidedown overnight in PBW. I was under the impression that this stuff wasnt supposed to harm plastic?
It's not supposed to harm plastic and even says so on the BB website. Is it possible you used a higher concentration or it wasn't completely dissolved? That would cause it. I have never had to soak longer than 1-2 hours though to get rid of all the junk. I just use warm to hot water and let it sit for 30 minutes, then agitate and invert, another 30 min to hour agitate again and usually it is clean by then. If not I let it sit for 30 more minutes and by then it has always been clean.