If you own a saltwater pool, preparing it for winter isn’t just a recommendation; it’s a must. Even if you’re planning to hire a professional, knowing the basics of winterization can help you avoid costly surprises next spring. From preventing algae blooms to avoiding equipment damage, properly closing your pool now can save you thousands later.
Here’s what every saltwater pool owner should know before the cold weather sets in.
When Is the Right Time to Winterize?
Even if you live in a region that rarely sees snow, don’t skip this step.
- Start early – Aim to winterize once the water drops between 50°F and 60°F.
- Watch the calendar – In Minnesota, that typically means late September through early October.
- Don’t delay – Salt cell damage can occur in cold temps, requiring expensive replacements.
Skip the Salt Dump
It may be tempting to oversalt your pool in hopes of keeping it cleaner through winter, but resist the urge.
- Stick to the manufacturer's recommended range.
- In winter, keep levels on the lower end of that range.
- Avoid adding any additional salt in the two weeks before closing.
Balance Water Chemistry First
Before you add any winterizing chemicals, your pool’s chemistry needs to be in check.
- Test and adjust pH, calcium hardness, and alkalinity.
- Imbalanced water can lead to mineral scaling on pool surfaces.
- Proper chemistry makes the spring opening much smoother.
Deep Clean for a Fresh Start
A spotless pool now means fewer problems later.
- Skim, brush, and vacuum the entire pool.
- Remove all leaves, bugs, and debris.
- Cleanliness now prevents algae and makes reopening a breeze.
Remove Equipment and Store It Safely
Take out all detachable accessories and stow them for the season.
- This includes ladders, slides, diving boards, and handrails.
- Clean and dry thoroughly before storage.
- Keeps them in good condition and ensures a tight pool cover seal.
Add the Right Winter Chemicals
Using the right products in the correct amounts is crucial.
- Consider a winterizing kit specifically designed for saltwater pools.
- Not sure what to buy or how much to add? Call in a pro to do it right.
Adjust the Water Level
Depending on your pool type, lowering the water level may be necessary.
- Above-ground pools: Lower the water 6 inches below the skimmer.
- In-ground pools: Aim for 12 inches below the skimmer.
- Vinyl-lined pools: Consult an expert to see if draining is advised.
Clean the Salt Generator
The salt cell can’t be ignored during winterization.
- Remove and inspect the cell for calcium buildup.
- Use a plastic scraper or high-pressure hose, never metal.
- Gentle cleaning protects your equipment from costly damage.
Blow Out the Plumbing Lines
- Water left in pipes can freeze, expand, and crack your plumbing.
- It can even damage decking and pool surfaces.
- If you’re unsure how to do this, hire a specialist for peace of mind.
Cover Your Pool Correctly
Finish the job by sealing everything up.
- A pool cover keeps out leaves, debris, and excessive rain or snow.
- It also helps maintain balanced water chemistry through winter.
Need Professional Help?
If pool winterization feels overwhelming, or you don’t have time, Royal Pool & Spa is here to help. Since 1988, we’ve been helping Twin Cities homeowners protect their pool investments through expert opening and closing services.
📞 Call us at 651-779-7606