A few months ago, I made a 3 5gal corney kegs of beer, Belgian Triple, Alt and an Oktoberfest. After sitting for a few weeks, 2 of the three developed what I could only describe a very strong taste that overpowered everything about the beer. I thought that I had screwed up the recipe, so the next few batches I made I bottled, and they turned out fine.
I made another 2 batches a few weeks ago, cleaned and santised the crap out of everything and kegged them again, with the intent of having them available for National Homebrewers day. I sampled it last Saturday, and it tasted awesome. I also noticed that my newly refilled CO2 was almost empty. There was a noticible lack of carbonation, but it still tasted fine.
By Sunday, the tank was empty, so I took it to be refilled on Monday. Got it back on Tuesday, hooked it up and discovered a leak at the regulator/tank connection. Sorted that out and let the Beer (Belgian Tripel and Dark Wheat) sit for a day at 12psi (apparently the middle ground for all beer). Sampled the Belgian Tripel and that strong overpowering taste is back.
So I'm begining to wonder if there is such a thing as too much carbonation, and if so, would it impact the flavour as violently as this?
Thanks for your time.