I put a beer brew on just a simple wit barrel brew, but a cold snap here in nz has dropped the average temp to just below 20c and it has stopped bubbling away after only 4 days. Is there a cheap and easy way to get the temperature back up and keep it up. I don’t have a heating pad.
You could get a heating pad, or maybe get a bigger barrel and fill it with warm water (although you would have to keep adding more water as it cools).