Winterizing a 200,000 gallon commercial pool

We live in a place where temperatures drop below freezing in the off-season, and we don’t have a cover for our pool.

If we choose to blow out and cap the lines for winter, what’s the best way to add chlorine since we won’t be able to use the chlorinator?

Should we just use granulated chlorine as needed or use a floating chlorine bag filled with chlorine pellets? What do you think?

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If you’re in an area with long seasons, and it seems like you are, isn’t liquid chlorine the best way to manage CYA?

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Ten floating containers with tablets inside? It seems like this might be something worth paying someone to handle.

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@AquaAdventurer I’m the one getting paid for this, :grin:. Usually, we keep the pump running all winter, but sometimes it trips, and if it’s freezing and it’s the weekend, the pipes might freeze. I wanted to try turning the pump off to prevent that and save on the electric bill.

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@Umbrielle The only pools I’ve seen this large are usually emptied in the winter.

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@AquaAdventurer It would cost around $3,000 to refill it with water, and we don’t have a cover for it.

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We have a 132,000-gallon pool, the largest residential pool in Ontario. We blow out and plug the lines, and the customer runs the robot until it starts to freeze. No chlorine is added until spring.