National Pool Closing Day

Opening your pool for the season is often a great event for you and your family. But just as opening your pool is important, closing it is as well. To help remind everyone to properly prepare their pool for the off-season, we recognize National Pool Closing Day, which this year falls on Sept. 19.

Why you should close your pool

Closing your pool during the off-season is important because if you don’t, you’ll have significant work to make it swimmable again when spring/summer rolls around. This is partly because leaving a pool open year-round would mean that plenty of debris has made its way into your pool — settling into the bottom, clogging up your skimmer — and most importantly, your pool’s water chemistry will become extremely unbalanced.

To put things in perspective, if you fail to properly close your pool, opening it will be more costly to set your pool right up again. This can all be avoided if the proper measurements are taken to close your pool before the winter months arrive. Seems like an obvious choice to us.

How to properly close your pool

Check your water’s chemistry and add winterizing chemicals

First and foremost, you must check the water chemistry in your pool. Depending on the result, balance the pH, alkalinity levels, and calcium hardness. Did you know that balancing the chemicals in your pool water before closing actually protects it from scale building that can occur over the winter months? We also suggest shocking your pool with chlorine and adding algae remover to kill any remaining bacteria and prevent algae from growing in the water.

It’s advised that you leave your pool alone for a full 24 hours after balancing the chemicals before you go to the next step.

Clean up dirt and debris in your pool

Scrub your pool walls and floors with a pool brush attached to a telescoping pole; ensure that you're getting into the nooks and crannies to the best of your ability.

Brushing your pool will kick up any sediment hanging around, as well as disturb the beginnings of any algae spores. Manually vacuum all the contaminants you kicked up while brushing or entrust your robotic cleaner to do the job for you if you own one.

Turn off pool equipment

To prevent any damage from freezing, it’s best to drain and clean all pumps, filters, heaters, and other equipment. If your equipment has leftover water sitting in the equipment, you run the risk of the water freezing and cracking when the temperature drops. If possible, any small pumps or filters should be stored indoors for the winter.

Lower the pool water level

It’s best if you lower the pool water 2 inches below the lowest return line. Lowering the water level properly when you’re closing the pool helps prevent freeze damage, and in some instances, overflow. If you live in an area where snow isn’t an issue, but rain is, it’s a good idea to check the water level while the pool is closed.

Add a winter cover

Last but not least, install a winter cover for your pool. If you already own a winter cover, ensure that it fits correctly and also inspect it for holes or damage in the surface material — where debris can get through to the water. It’s also suggested that water bags be used to secure the winter cover. This maximizes the security of your pool from those harsh winter months.

For many pool owners, closing your pool can be a disappointment — the end of summer fun. But properly closing your pool has its conveniences, especially when you’re opening the pool next pool season. It’s the smart way of pool ownership!