I have four rain barrels. Nothing fancy, just the tops cut off of plastic 100 gal. barrels DH brings home for free from work. They had soap in them. After rinsing, they are perfect for rain barrels. Some years I put gold fish in our barrels to eat the mosquitoes. This works really well. I buy the fancy tail ones that I sell back to the pet store at the end of the season. They get really big in the barrels.