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Review title: Too loose
Product review: I have two carboys, one is 6.5 gallons and the other is 6.1 gallons. When fitted on either of them, this lets CO2 escape through the bottom of the cap, rather than directing it through the fermentation lock I have fitted onto the top. That means that when fermentation is done (or before it begins) and there is no more positive pressure from inside the carboy, air and other contaminants can get into the carboy and cause infections. It's also harder to judge visually when fermentation is occurring and when it has ended. This product is a good idea in theory, and I was looking forward to an easier way to start a siphon, but not sure it would work even for that because of the looseness of the fit. Not happy with my purchase.
