We live in Northern California east of the San Francisco Bay Area. We have very few nights where the temperature gets down to freezing every year. We have a tiger barb living in a whiskey barrel pond and are wondering if he will be able to make it outdoors through the winter. We can add a heater if we need to but were just wondering if anyone else has had any experience with tropical fish outdoors. He did great all summer and the temperature here gets up to 110 of higher at times. Any thoughts would be greatly appreciated.