As the weather warms, many homeowners begin planning outdoor activities around the backyard pool. All that fun in the sun is not as enjoyable, however, if the pool is full of bugs. Topical insecticides may protect swimmers on land, but sprays and lotions wash off and are ineffective against bugs already in the pool. It may be difficult to eliminate all insects, but there are several options for reducing the population of these unwanted pests.
Install a pool cover serves to keep unwanted pests and leaves out of the pool. A cover also slows down evaporation, conserving water and reducing your water bill.
Hang a lighted bug zapper near the pool. An electronic bug zapper will not be effective against crawling bugs, but flying insects will be attracted by the light. Once they enter, the mechanism vaporizes them on contact. Some people, however, may not be comfortable hearing the sound of an electronic bug zapper continually.
Perform regular pool maintenance. Use a pool test kit to maintain proper chlorine levels as some bugs are repelled by chlorine. Eliminate or reduce the insects' food sources. Some insects feed on algae, while others feed on bugs. Skim the pool of leaves, insects and other debris regularly and use an algaecide as needed to keep the water free of algae.
Consider installing a pool enclosure. Screening in the pool is arguably the priciest option, but it is also the most effective choice as it creates a physical barrier between the bugs and your guests. Enclosures range from do-it-yourself kits to elaborately designed structures made of glass or fiberglass.