If you're finding backswimmers in your pool, there are a few things you can do to get rid of them. First, make sure that there is no standing water around your pool area for them to breed in. If you have any potted plants near the pool, empty out the pots and remove any stagnant water. You can also try putting a piece of raw chicken or fish into the pool; the backswimmers will be attracted to it and should drown. Finally, keep your pool clean and free of debris so that the backswimmers don't have anything to eat.