Oh how cool! Glad it it's getting notice! We moved several years ago from swampy wetlands to the desert, we weren't here long before digging a little divot in the ground and slapping a kiddie pool in. The cheap pool has now cracked and been pulled out but it made a nice press while it lasted for the ground below it. We know even with how hard and almost stone like the ground is, that it is leaking but, it's doing wonders for the little patch of grass and gotu cola planted next to it by softening the ground below them letting their roots get longer. We are in monsoon season now but, this winter when its dried back out, we want to do a more permanent pond liner to make sure it's not losing into the ground anymore. Love helping wildlife but water gets expensive out here, lol. Oh, I know minnows or other small fish had been mentioned, dragonflies are also natural mosquito predators. They lay eggs I the same stagnant waters, their larvae feed on mosquito larvae, and grown dragonflies feed on mosquitos! I did not learn that until moving to the desert and being surprised at the number of mosquitos we have to deal with... in the DESERT!! Also have seen more dragonflies of so many different colors too! I know from growing weed, that you can get ladybugs and other aphid predators online, haven't checked about dragonflies though.