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Pool Closing Tips: Adjusting the Chemicals

Which Chemicals Should I Use for Pool Closing?

Doing the right pool closing tasks every winter will make it much easier to open your pool once the weather starts to heat up again. Follow our helpful tips on which pool chemicals to use to ensure that your pool will be clean, clear and easier to open next spring.


Tools You’ll Need:


Pool Closing Steps:

1.  Adjust the Pool Chemicals.  This is the first and most important step to make sure your water is clean and healthy for next year.  Ensure that the pool pH, alkalinity and calcium levels are balanced and exactly where they need to be. If you don’t do this, you risk corrosion of your pool equipment, scale stains along your pool liner, and potential algae or bacteria build up along the way. Keep your pH level between 7.2 and 7.6, the alkalinity between 80-120 ppm, and the calcium level between 180-220ppm.

2.  Add Pool Shock.  It’s always a good idea to shock pool water before the winterization process is complete. You need to be sure all left over bacteria and algae is completely removed from the area.

3.  Use Pool Algaecide.  Consider adding algaecide to your pool after the shock is complete. This is a great way to kill and remove algae that might already be in your water and it’s a perfect preventative measure to make sure that more algae doesn’t start to bloom and multiply. Once algae are in full bloom, they can potentially discolor your pool and create a nasty smell when you open it up for next year. Check your chlorine levels carefully - the only way the algaecide can work effectively is if the level returns to 1-3ppm before you add it.

4.  Clean the Pool.  Now, you will need to remove all of your pool equipment before the winterization process is complete. All of it needs to be stored in a safe, dry place. Pool equipment such as ladders, baskets, hoses, your entire filtration system (filters, pumps, heaters), and any pool accessories you feel might become damaged during colder months should all be stored.

- Use a pool skimmer for this next step. This tool will make sure that all excess dirt and debris (like leaves and insects) are filtered and removed from the water. Be very detailed with this step because you won’t be able to go back and remove something once the winterization process is finished.

- Next, vacuum and brush your pool walls and floor for the ultimate clean. Make sure nothing is left behind to damage your pool when you least expect it. If you happen to notice a lot of debris towards the bottom of your pool, simply use your skim bag to collect it all before you finish the above step. Obviously, the more debris you collect the better.

5.  Lower the Water Level.  Utilize your pool pump to lower the water level in your pool.  Make sure it appears below the skimmer depending on what pool cover you have. If you’re using a mesh cover, the water needs to rest 12-18 inches below the skimmer. However, if you have a solid cover, the water needs to rest 3-6 inches below the skimmer instead. Drain all pool equipment (your entire filtration system), including the pool pump, filters, heater, and chlorinators before winter begins. Your pool equipment needs to be completely dry and free of all excess water to insure it won’t freeze or corrode when the outside temperatures start to drop. Open all drains and release the water, then remove the filters completely and clean them with a garden hose, if you are unable to remove the filters, then use a vacuum or air compressor to blow out any leftover water inside.

By following these easy pool closing steps now, your job will be much easier next spring when it’s time to open the pool for a new season. Take advantage of our helpful tips and useful Doheny’s pool closing winter kits for the most effective way to close your pool this year.

Doheny’s Recommends:

- Winter Closing Kits