Seasons Magazine February 2017

How does Wind and Rainy Weather affect my Pool?

In this article we discuss how weather affects your swimming pool and explain what you can do to address these effects.

Ah, summer—warm weather, enjoying the pool with friends and family, so far it has been a bit hit and miss with lots of weather storms bringing wind, rain and temperature variations.

So what does this do to the chemistry in your swimming pool? Rainy weather can definitely have an adverse effect on your swimming pool water. It may come as a surprise, but the problems caused by rain do not result from dilution of the chemicals in your pool water. An inch of rainwater added to a 70,000 litre pool increases the amount of water by only about 2%. Therefore, dilution is not usually an issue.

It is more about what piggybacks on those raindrops: algae spores present in the air and airborne debris are the things that cause problems. When it rains, these spores and other organic material in the air get washed into the pool water. Spores on surrounding vegetation or on the ground, along with other debris, also wash into the pool water.

All of this algae and organic material in your pool water must be dealt with; it reacts with your pool chlorine reducing the active chlorine level in the water.  Additionally, when the organic matter decomposes it provides fuel for the growth and reproduction of algae. Combine that with a little sunlight, especially in warm water, and the conditions become ripe for accelerated growth of algae and turning your pool green!

So, what to do? The solution is to make sure that the rate at which the algae in your pool are being killed is faster than the rate at which they are reproducing, and to remove the organic matter from the pool. And that means giving your pool a shock treatment of chlorine and adding a good algaecide killer promptly. Scrubbing walls and vacuuming any debris off the floor also helps the process.

The debris added to the pool with rainfall can also affect the pool water chemistry. For this reason, it is important that you test your water regularly.

Maurice’s Pools & Spas have trained technicians using computerised water analysis to test your water and provide you with a recommendation report to get your pool water balanced. They can also provide advice on the best chlorine and algaecide for your pool to treat the algae and to keep your sanitiser level in the recommended range of 1-3ppm.

They also have a number of automated products available to take the hard work out of maintaining constant chlorine levels, monitoring pH as well as the use of suction or robotic automatic pool cleaners to keep dirt, dust and leaves entering your pool under control.

Remember when that sun does come back for more than a day and everyone starts to use the pool for more than a quick dip – the demand on your chlorine will increase  so adjust your levels and run your pumps for 10-12 hours a day and backwash the filter regularly – circulation and filtration are paramount.