Closing Time: Part 1 - The Prep: What to do 1 week before


We know, it’s hard to say goodbye to summer. The warm sun on your skin, the pool parties and barbecues, fighting to keep your pool clean and blue...wait, let’s forget about the last one, because next summer you’ll have Sutro helping you out!

The last thing we want to do is kick off the next swimming season with pool problems, so we’ve got you covered with a three part series to help you winterize if you’re choosing to say “see you next year” to your pool.

This is what your water chemistry should look like about 4-7 days before you pull the lid over your pool:

Chlorine: 1.5 to 3.0
Total Alkalinity: 80-120 ppm for plaster pools, 120-140 for vinyl-lined
pH: 7.4 to 7.6
Calcium Hardness: 200-400 ppm

Not sure how to get your chemistry at the right levels? You can use a test kit to get the right measurements, and then text us at and we’ll tell you what you need to do to set your water chemistry straight.


Your pool should be as clean as possible before you close it up, so you don’t lock and freeze in any dirt and scum. Skim, brush, and vacuum your pool to make sure it’s squeaky clean, and then empty out your skimmer and pump baskets. We’ve also designed a new skimmer net basket with increased flow and debris capture rate, that’ll keep your pool even cleaner next season. Scrub your tiles even! If you need help taking care of your skimmers and filter, you can request a service tech to get your pool in good shape before winter hits. Your quick check list:

  • Scrub tiles
  • Skim
  • Brush
  • Vacuum
  • Empty skimmer basket
  • Empty pump basket
  • Rinse filter cartridges


Your equipment needs to hibernate, too. Drain your pump and heater, and keep track of all of the little screws and clips in your baskets. After years of closing up pools, we know that it’s easy to misplace the small items. And don’t worry: in case you need help with any of this, we can get a service tech out to you in no time.

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