Winter Closing Treatment Calculator ❄️

Plan your pool's winter closing chemicals. Calculate algaecide and shock amounts to ensure a clear opening in the spring. Taking the time to balance your water before the winter freeze prevents stains and saves you hundreds on startup chemicals next year.

FAQ

When should I close my pool for winter?

Wait until the water temperature is consistently below 60°F (15°C). Algae struggles to grow in cold water, ensuring the pool stays clear until spring.

Do I need to drain my pool for winter?

Never drain a pool completely! You only need to lower the water level below the skimmer and return lines to allow for proper plumbing blow-out and plugging.

Should I use a winter algaecide?

Yes. A specialized winter algaecide or a long-lasting 'polyquat' helps provide an extra layer of protection as the chlorine levels naturally dissipate over the long winter months.