Chat on WhatsAppHow to Close Your Pool for the Winter
A Step-by-Step Fall Pool Closing Guide by Aquatec
As temperatures begin to drop in Toronto, it's crucial to prepare your pool for the harsh Canadian winter. A proper pool closing not only protects your investment but also makes spring reopening much easier and less expensive.
At Aquatec Pool Care, we've been helping homeowners across the GTA safely winterize their pools for over 20 years. Here's our expert-backed guide to closing your pool the right way.
Why Closing Your Pool Matters in Toronto
A professional pool closing prevents:
- Freezing damage to pipes and equipment
- Algae growth during the off-season
- Staining, scaling, and liner damage
- Expensive repairs in the spring
Aquatec's seasonal pool closing services are designed for Toronto's unique weather conditions and comply with local best practices for pool maintenance.
Step-by-Step Pool Closing Process
1. Deep Clean the Pool
Skim the surface, vacuum the bottom, and brush all walls and steps.
Removing organic debris now helps prevent staining and algae blooms over winter.
Aquatec provides deep cleaning as part of its full-service pool closings, so you start the season with a spotless pool.
2. Balance the Water Chemistry
Proper chemical balance prevents corrosion and scale buildup.
- pH: 7.4 – 7.6
- Alkalinity: 100 – 120 ppm
- Calcium Hardness: 200 – 400 ppm
- Sanitizer: Within ideal range (chlorine, bromine, etc.)
Aquatec offers in-home water balancing with winter-grade products tailored for Toronto's winter.
3. Lower the Water Level
For mesh covers, lower water 12–18 inches below the skimmer. For solid covers, 3–6 inches is enough.
This protects your skimmer and plumbing from freeze damage.
Our technicians at Aquatec handle precise water level adjustments to prevent freeze-related damage.
4. Drain and Blow Out the Lines
Use an air compressor or pool blower to remove all water from plumbing lines.
Add winter plugs to return jets and skimmers.
Aquatec performs professional-grade line drainage and plug installation, which is essential in the Toronto climate.
5. Add Winter Chemicals
Apply winter algaecide and a non-chlorine oxidizer.
These prevent bacteria and algae buildup until spring.
We use premium, winter-specific chemical kits at Aquatec to protect your pool throughout the off-season.
6. Install the Winter Cover
Secure your pool with a winter safety cover or tarp.
Ensure it's tight to prevent debris, snow, and animals from entering.
Aquatec offers cover installation, inspections, and replacements to ensure full winter protection.
Special Tips for Pool Owners in Toronto
- Schedule your closing before temperatures dip below freezing — ideally between mid-September and late October.
- Trim nearby trees to avoid extra debris during winter.
- Inspect the cover mid-winter to clear snow buildup or reposition as needed.
Aquatec offers seasonal reminders and mid-winter cover checks for clients in the GTA.
Trust Aquatec With Your Pool Closing
DIY closings can lead to costly mistakes. With Aquatec Pool Care, you get:
- Certified technicians trained in Toronto weather-specific procedures
- Proper water and line drainage
- Winter chemical kits tailored to your pool
- Cover installation and storage assistance
Book your fall closing now and enjoy peace of mind all winter long. Aquatec — trusted pool service in Toronto for over two decades.
Contact Us Today
Book your fall pool closing now and avoid winter damage. Aquatec is ready to help you winterize with confidence.
Frequently Asked Questions
When should I close my pool in Toronto?
Ideally between mid-September and late October, before temperatures dip below freezing.
How far should I lower the water level before winter?
12–18 inches below the skimmer for mesh covers, or 3–6 inches below for solid covers, to protect the skimmer and plumbing from freeze damage.
Why do I need to blow out the lines before closing?
Removing all water from the plumbing lines with an air compressor or pool blower, then plugging the return jets and skimmers, prevents freeze damage to pipes and equipment over winter.
What chemicals should I add before closing?
A winter algaecide and a non-chlorine oxidizer help prevent bacteria and algae buildup until you reopen in spring.