10 Essential Steps to Winterize Your Pool

How to Winterize Your Pool

1. Start One Week Before Closing
   Begin the winterization process a week before your intended closing date. Closing your pool while the water temperature is still warm can promote algae growth. Ideally, wait until the water temperature consistently falls below 60 to 65 degrees Fahrenheit. Start by adding a phosphate remover to help prevent algae blooms.

2. Clean Your Pool Thoroughly
   Skim debris from the surface, empty skimmer baskets, vacuum the floor, and brush the walls. A clean pool makes opening it in the spring much easier.

3. Balance Your Water Chemistry
   Proper water chemistry is crucial to prevent damage to your pool surfaces and equipment. Aim for the following ranges:

   • pH: 7.2 – 7.4
   • Alkalinity: 60 – 120 ppm
   • Cyanuric Acid: 20 – 40 ppm
   • Calcium Hardness: 200 – 400 ppm
     
     

4. Shock and Chlorinate Your Water
   Superchlorinate your pool water to eliminate bacteria and algae before closing. Shock the pool at least two days before the final closing, or the night before if necessary.

5. Apply Algaecide
   After shocking the water, apply an algaecide. Make sure to apply these products separately, as they should not be mixed.

6. Backwash Your Pool Filter
   Backwashing clears your filter of dirt and debris. Water should be sent backward through the filter to remove clogs and maintain effectiveness.

7. Prepare Your Equipment and Adjust Water Levels
   To prevent damage from freezing temperatures, adjust your water level to four to six inches below the skimmer (for vinyl-lined pools) or tile line (for plaster pools). Drain pool lines, add antifreeze, drain the filter, blow out plumbing lines, and turn off power breakers. If your area doesn't freeze, simply fill your pool to a normal level and check for evaporation monthly.

8. Install a Safety Cover
   A safety cover protects your pool from accidents and winter debris. Choose the right type of cover for your pool for added safety.

9. Lubricate Essential Equipment
   Lubricate pump O-rings, backwash valve O-rings, and threaded drain openings to prevent rust and ensure a tight seal for next season.

10. Store Accessories and Chemicals Safely
    Finally, store all pool accessories (like ladders and toys) and water care products in a safe, climate-controlled space. Keep chemicals well-ventilated and separated.

Since every pool is unique, consult your local pool professional for specific advice tailored to your pool and climate. By following these steps, you’ll ensure your pool is well-prepared for winter, setting the stage for a smooth opening next season. Your future self will appreciate the effort!