This guide is for closing pools in regions with non-freezing temperatures. If you live in an area that experiences freezing conditions, it’s best to consult a local pool maintenance specialist. Freezing temperatures require special attention to draining filters and pumps to avoid damage caused by water expanding as it freezes. For regions where temperatures rarely, if ever, drop to extreme lows, here’s a helpful guide to winterizing your pool.
As the season winds down and cooler months approach, pool owners without heating systems may start considering how to close their pool for winter. So, what’s the best way to do it?
Don’t Close Your Pool Too Early
A good tip is to avoid closing your pool too early. Shutting it down in September, when there are still warm, sunny days, can encourage algae growth. The longer you leave the pool open, the better—ideally until mid to late October. However, every area has its own unique climate, so use this as a general guide to effectively close your pool.
Steps to Winterize Your Pool:
- Check the pH: Keep the pH at 7.6. It’s a good level since the pH will likely drop naturally over the winter months as water temperatures decrease.
- Shock the pool: This step is crucial for eliminating algae spores and bacteria. After shocking, wait for chlorine levels to drop to around 1-3 ppm, then backwash and rinse the filter according to the manufacturer’s instructions.
- Add winterizing chemicals: Add Aquality INC Winterizer, then run the pool overnight to circulate it throughout the water.
- Reduce pump hours: Lower the pump’s operation to one hour a day. This not only maintains basic water movement and filtration, but it also helps prevent the pump from seizing in damp, cold environments.
- Cover the pool: If you have a pool cover (and it’s recommended), now is the time to fit it. A cover will help protect your pool from debris and reduce maintenance during the off-season.
- No cover? If you don’t have a cover, make sure to periodically remove fallen leaves with a net. Leaves can break down and lead to algae growth or staining, so keep an eye on the pool.
- Monthly chlorine maintenance: While it’s not essential, adding a little chlorine once a month can help with your spring startup. A cleaner, fresher pool when reopening in the spring will save you time and effort in the long run.
Following these simple steps will ensure your pool is well-prepared for the winter months, leaving you with a smoother and cleaner opening in the spring!




