This summer I tried an experiment by putting gold fish into my rain barrels to help curb mosquito larvae population.
The gold fish did a fantastic job - the barrels were clear of mosquito larvae -- a first for me. So now that summer has ended and the rain barrels needed to be emptied so that they don't freeze and crack over the winter, I needed somewhere to put all these goldfish.
I stumbled upon the perfect solution at a garage sale early in September. A almost new fish tank in mint condition complete with all the accessories ; pump, filter, decorations, light, heater etc. All I needed was a net to catch the fish. The gold fish are now in their new home -- their winter retreat !
In the spring when the rain barrels start to fill up they will move back outdoors.