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Our Wet Spring and Your Swimming Pool

Drought last year – now this year Mother Nature seems determined to over compensate in tipping those water scales back to the middle. Small amounts of rainwater aren’t going to change a lot when it comes to your pool water, but we’ve seen some really torrential downpours lately and there seems to be no end in sight.

Here are some things to keep in mind and watch out for.

Pool Chemistry

  • Rain is acidic, meaning it has a lower pH level than your pool water. In fact, rainwater typically has a pH of about 5.0, where pool water should be between 7.4 and 7.6. Our eyes have a pH of 7.5, which is the reason for that pH guideline, by the way, and water that’s too alkaline causes that ‘burning eye’ syndrome.
  • If rainfall is less than about 12mm the pH may be lowered temporarily but should bounce back on its own.
  • A large amount, especially if it falls within a short period, is a different story. You’ll want to drain the pool of excess water and then re-test the chemistry and adjust chlorine or salt levels (depending on the system you use) accordingly.


  • Wind, rain and runoff can bring a lot of debris into your pool.
  • Make sure you clean it out right away, before it’s had a chance to start rotting and contaminating your pool.


  • That bane of all swimming pool owners, the cause of ‘green pool syndrome’, algae spores can enter your pool via the rain and the wind.
  • Be vigilant – check the pool after a heavy rain – any murkiness may be algae.
  • Take action immediately – algae will begin to take hold in grouting, around fittings, in any corners nooks and crannies.
  • You may require algaecide or an extra shock treatment. If you see it, give us a call.

In Case of Flooding
If rain is heavy enough, sodden ground has actually been known to push a concrete pool right out of the ground.
Hopefully your property will never get to that point, but you should keep an eye on the yard and make sure there’s good drainage – i.e. not a lot of sodden ground around the pool.

One more thing – watch that standing water around the pool!
A female mosquito can lay 150 eggs in a mere 5 drops of standing water. Make sure that you keep the area – along with your pool – clean.

Questions or Concerns?
Contact Bremner Pool & Spa today for swimming pool service, swimming pool repairs, safety tips and maintenance. Free Quotes Available.

About Bremner Pool & Spa:
Established in 1981, Bremner Pool & Spa is one of the premiere swimming pool service companies in Toronto, the Greater Toronto Area (GTA) and Durham Region. We operate 11 state-of-the art vehicles and offer a variety of high quality and eco-friendly products & services including swimming pool repair, openings, partial swimming pool openings, swimming pool closings, weekly pool and spa service, pool leak detection & repair, heaters, liners, pumps and more. As well, Bremner Pool & Spa complies with all City of Toronto By Laws for Pools, Hot Tubs and Spas.

Swimming pool services including openings, renovations, installations and maintenance throughout Scarborough, Toronto and the GTA including Ajax, Durham, East York, Forest Hill, Markham, North York, Oshawa, Pickering, Richmond Hill, Thornhill, Unionville, Vaughan and Whitby, Ontario.