mosquitos breeding in the rainwater butt
I think the lid is perhaps not tight-fitting enough to keep out the egg-laying females. any suggestions on how i can kill the larvae? I need to be able to use the water for plants. i have to scoop water out from the top, as the butt is set too low to allow a tap in the bottom. i've read that a layer of oil or soap on the top would prevent the larvae from breathing, but i don't think that will be too good for my plants.