Fredy Perlman wrote:Here at the 47th parallel, our summer sun has a UV intensity (I think that's it) that bleaches clothes in a couple weeks and destroys plastics. Garbage bags, tarps, shopping bags become brittle and fly apart at a touch. So do milk jugs, so it depends on where you are...but you don't want to clean up fragmented denatured plastic.
Mike Haasl wrote:I've seen that done. I think the smaller containers give the benefit (or disadvantage) of shorter thermal cycles. While a 55 gallon drum may average out temps for a few days, a 1 gallon jug may do it for hours. So they probably wouldn't get you through two cold days in a row but they should help on every cold night.
Where I've seen them used, they were painted black. I'm not sure if the paint protected them from UV degradation but it likely helped them collect more heat.
John F Dean wrote:Hi Elle,
I keep 200 gallons of water in my 26 ft high tunnel. In my case I am using 3 gal plastic jugs. My neighbor has been saving them for me for years. Over time, they add up.