If you have rainbow fishes, you will probably want to feed them their preferred live food, mosquito larva.
If you want to cultivate your own mosquito larva, you can do so by establishing a bucket or tub outside filled with fresh water, which is in partial shade.
Once you have set up your tub, you will want to put some floating weeds in the water for the mosquitoes to land on and lay their eggs.
Once you notice egg rafts, spoon them into a jar with a mesh lid cover until the eggs hatch into larva.
Then you can simply pour the mosquito larva from the jar directly into your aquarium to feed your rainbow fish.
If you are trying to avoid mosquitoes from hatching anywhere near you home, and you have many standing water sources such as fountains or birdbaths, you can purchase mosquito dunks to place in the water, which will kill mosquito larva.
Dunks generally work up to 30 days, and you will know how many to use depending on how large the water area is.
The dunks contain a biological agent that kills the mosquito when ingested, but is safe for all other animals and humans.
Try some of these solutions to kill the little skeeters.
Again some work better than others while some are more expensive than others as well.
Try them out until you find the one that gives you the most relief from swarms of buzzing mosquitoes.
Finallyyou might want to try netting which works the best.
Netting is so fine that the mosquitoes cannot pass through it keeping you protected from them.