Contaminants in the pool from rain are introduced as it falls through the air, picks up dust, pollen, pollutants, oils, even algae spores. Run off from your pool deck may also bring in some contaminants from your lawn or the deck itself. Trees and other vegetation overhanging the pool will be washed clean by the rain, right into your pool, adding phosphates and other organic material. Rain can also destroy your pool’s water balance. It dilutes the pool chemistry, and it can affect pH and alkalinity as well. To prevent this, try and limit the amount of landscaping that is near the pool such as large trees, bushes, vegetation and loose soil.
Too much Water in the Pool may lead the pool water level to completely cover the opening of your skimmer, then floating debris like leaves and insects can’t get in, so your skimmer cannot clean your pool water effectively. To lower the water level in your pool to keep proper skimming action, and to avoid contamination from planters and deck area flooding, you can drain it a little by using your filter’s “waste” valve setting, if available. Some pools have a hose spigot plumbed after the pump which you can connect a garden hose to and lower water level. If your pool does not currently have a hose spigot, now would be an ideal time to have one installed.
High Wind, Debris & Projectiles can also wreak serious havoc. Just like rain water, wind will introduce organic and inorganic material into your swimming pool and can cause problems for you and your pool’s water. Due to the potential for exposure to lightning, always wait until a storm has passed then immediately net out debris and other organic materials that were introduced into the pool water in order to limit exposure until your weekly service appointment approaches.