We have an inground swimming pool that we haven't used in a few years (it's just too expensive for us to maintain at the present time).
Well it's almost June and the frogs are a' plenty. Our pool (covered, but with a top layer of about 2ft of water over the tarp) has become a pond/swamp for these little critters, and at night the sound is keeping us up (and our neighbors) all night long.
I'm tempted to start routinely dumping chlorine into the water that's on top of the tarp, but that will get almost as expensive as…maintaining a swimming pool ;-).
There really isn't anything we can do about the water on top of the tarp. All we have to keep the tarp sitting on top of the pool are a bunch of cinder blocks that weigh it down. In between the blocks the frogs can slip under the tarp and get access to the main pool anyways.
Best Answer
Commercial frog repellents exist. Mothballs are recommended by some people, others say they don't work. It is illegal to use a pesticide (yes, mothballs are pesticides) in any way other than the way directed on the label. I'm not sure if fake plastic snakes would help. Most animals are terrified of plastic owls.
Here's an approximate frog repellent solution (legal per the Federal Insecticide, Fungicide, and Rodenticide Act), for use in a trigger spray bottle: 1 quart water, 1/2 cup citric acid, 1/2 cup salt, 1 oz sodium lauryl sulfate (it's a kind of surfactant -necessary to mix oil and water- that can be found at a tractor supply or online), 0.5 oz peppermint oil, 0.25 oz clove oil. Collect and relocate the frogs before spraying. Spray 24" band around the pool, weekly or as necessary; avoid spraying brass, galvanized steel, and other metal finishes.