We have an above ground pool with about 6 inches of water that does not drain. The drain is located above the bottom, to keep water in it and weigh down the pool during the off season.
However, the still warm water is the perfect breeding ground for mosquitos. This is a problem during the advent of warmer weather, before the pool is used.
It is a salt water system, and the pumps & chlorinator obviously cannot be operated with the water drained to this level. Once the pool is operational in the hot season, the conditioning and filtering prevent this mosquito problem. So this is really only a problem when the Spring weather is warm enough for breeding, but prior to starting the pool for the Summer.
Before I start-up the pool to fill it, I drain the water with a sump or water feature pump and then wet-vac it dry. This is something I do once at the beginning of the season, and takes a few hours of work. As measure to prevent mosquitos it would not be so good, since the bottom will fill with every rainfall and I'd have to start over.
What can I do to prevent mosquitos breeding until I start-up the pool for the season?
Best Answer
Mosquito Dunks are a doughnut shaped product for exactly your problem. They contain a bacterium toxic to mosquito larva but not toxic to humans, pets or birds. They will only kill larva.
Any adult mosquito travelling by will still be available to bite you. You might also check out designs for bat or bird houses to encourage some natural predation.