Yep, I use those Dunks in my big tub of rain-water. The do a good job with those larvae. I have sold the vast majority of my bromeliads and I will never grow the number I had for the last two years. Mosquitoes shouldn't be much of a problem, but then, they don't seem to like my skin. If my wife is outside for 5 minutes and there is a mosquito within a mile, it will quickly get to her. She always gets pierced by those suckers and I never do.
