The Proper Chemicals: -Add 1 lb Granular Shock OR 1 gal. Liquid Shock per 5,000 gallons of pool water. -Add an appropriate sized "Winter Chemical Kit" or the proper amount of Algaecide/Winterizer. (If adding our famous "Winter Pill," add this pill right before you put on your cover--read directions on the Winter Pill.)
Once you know where your pool chemistry stands, balance the water, adjusting the pH to 7.2 - 7.6, alkalinity between 80 and 120 ppm, and calcium hardness between 200 and 350 ppm. Shock your pool with Pool Breeze Granular Shock or 12.5% Liquid Shock two days prior to closing.
Super chlorinate with liquid chlorine or other chlorine source and add winterizing chemical kit to pool; allow filter to circulate to evenly distribute chemicals. (Use chemicals as labels indicate.) Use 1 gallon of liquid chlorine per 10,000 gallons of pool water.
Winterizing Pool Shock
Shocking your pool before closing is necessary to kill any undesirables in the water. Let's face it, many people tend to drop their guard on pool maintenance in the last few weeks of the season. So it's a great idea to shock the pool before closing it for the winter.
The Proper Chemicals: -Add 1 lb Granular Shock OR 1 gal. Liquid Shock per 5,000 gallons of pool water. -Add an appropriate sized "Winter Chemical Kit" or the proper amount of Algaecide/Winterizer. (If adding our famous "Winter Pill," add this pill right before you put on your cover--read directions on the Winter Pill.)
On a monthly basis throughout the winter, you'll need to perform some routine chemical maintenance. Never use chlorine tablets during the winter: you'll want to opt for Assault 73 Shock or Quick Shock granular chlorine once a month (1 pound per 10,000 gallons.)
When the water has completely drained out of the plumbing lines (or after you've blown out the lines), put winterizing plugs into the return and skimmer lines. Add non-toxic pool antifreeze to all lines. This specialized antifreeze should be added at the rate of one gallon per 10 feet of pipe.
Shock the Pool
The usual treatment is one bag (or pound) per 10,000 gals of pool water, for clear water. If your pool water is hazy or green, add double or triple the normal dosage.
If you store your filter in a shed or a detached Garage make sure you cover your filter and keep it away from chlorine or any corrosive chemicals that off gas. Sand filters should be left outside.
Shocking kills any bacteria that might linger in your pool during the winter. We recommend shocking a few days before you close the pool. If that is not possible, make sure to shock the pool the night before you close it for winter.
You really only need one chemical (algaecide) to properly winterize a swimming pool. You need some other stuff to protect your pool from harsh winter conditions, but only one chemical to add when closing.
Even if you have your pool covered, some debris may still get in it during the winter. For this reason, you should consider running your pump on occasion whenever the outdoor temperature is between 35 and 65 degrees. Around four to six hours should be sufficient to remove debris and help promote good circulation.
Do I Need A Pool Pillow? While they're not 100% necessary, winter pool pillows are incredibly helpful. They help protect your pool from expanding ice and promote even weight distribution, which is why we highly encourage them for pool owners.
If draining is on the agenda, lower the water to a point slightly below the skimmer. Cover the water with the pool cover completely and weigh down the edges of the cover with sand-filled plastic bottles, to keep it in place.
The general recommendation is to use 1 pound of cal hypo shock for every 10,000 gallons of pool water, and 10 ounces of sodium hypo with around 12.5% chlorine to sanitize your pool. Make sure the pool water is at its normal level. Make sure your pool's pH is between 7.2–7.6 and its alkalinity is between 80–120 ppm.
Although, if you overdo the shock treatment, you risk getting green hair from chlorine due to the excess chlorine oxidizing the copper in the water. You can execute a shock treatment with a few different types of pool shock, just be mindful of how much you're using.
Though the growth rate of algae slows down as water gets colder, we recommend keeping the free chlorine level between 2-4 ppm, as mentioned above. In some areas it's possible to see steady temperatures above 60 degrees in January or even February, giving algae a chance to grow. Don't risk it.
It is very important to evaluate the water level in your pool and keep your water level well below the coping and tile or otherwise when the water freezes it will expand and the force of the ice will crack tile and coping resulting in expensive repairs.
If you have an above ground pool with the pool filter system and plumbing above ground (like nearly all above ground pools), pipes and pumps can freeze up in less than an hour of minus 32 degrees. The same is true for inground pool equipment that is not running when temperatures are below freezing.
The weather needs to be at or below 20 degrees Fahrenheit (-6.7°C) the pool pipes to freeze solid. At 32°F (0°C), water will begin to freeze up and will eventually freeze solid but after some hours or days.
If you want to winterize your Intex pool without breaking it down, you can. Just remember how susceptible they are to ice damage, and consider whether you want to run the risk of ruining your pool for the sake of skipping the chore of closing it.