Heavy shocking with granular chlorine will generally require 24–48 hours before the chlorine level has dropped to safe swimming levels (below 5 ppm).
And how long do you have to wait before you can swim? You should wait one hour per pound of shock product added, and then test the water to confirm the pH and chlorine are in the proper range before letting anyone enter the pool.
Shocking is the process of adding chemicals (usually chlorine) to your pool to: break apart chloramines, also known as combined chlorine. quickly raise your chlorine level. kill algae, bacteria or other harmful pathogens.
If your pool is green and cloudy, it's likely an algae problem. Algae can persist in a pool even after shocking. A green pool – especially one that turned green overnight or after rain, can also be from a pool pump that isn't properly circulating water or an issue with your filtering system.
Sun Down – You'll want to shock your pool in the evening when the sun has gone down. This gives your pool plenty of time during the night to free the chlorine and clean the water. In the morning, you should be able to enjoy your pool. If you shock your pool during the day, the sun's UV rays will dissolve the chlorine.
Chlorine issues often cause hazy-looking water. Adding a recommended dose of pool shock to your pool can clear it right up. Poor circulation or filtration can contribute to water clarity issues. Make sure your pump and filter are working properly.
How long to wait until you can swim? The general guideline is that it's safe to swim in a pool 24 hours after shocking it. To be safe, test your chlorine and pH using a chemical test kit to see if they are in balance. Make sure your free chlorine level has returned to 3ppm or less.
If you've already added chemicals to the pool you should run the water pump and filtration system and wait at least 24 hours before vacuuming again. This will allow the chemicals to circulate throughout the entire pool and prevent the recently added chemicals from being removed from the water.
Once you have cleaned the pool, you should move on to the sand and DE filter. The expert says you should backwash them. However, for a cartridge filter, it is best to remove the cartridges and hose them off.
You need to wait for at least 8 hours and up to 24 hours after using a chlorine-based shock before you can swim. And you'll want to retest your water to make sure your chemical levels are within range. If your free chlorine is at or below 5 ppm and your pH levels are at or below 7.6, it's likely safe to swim.
It's often recommended to shock your pool once a week. If you don't do it every week, you should at least do it every other week. This is necessary to maintain your pool's water chemistry. If you have a lot of people over in your pool or have a party, you may want to shock your pool more frequently.
To treat pool water made cloudy by a lack of chlorine, simply keep adding chlorine to the water until the water maintains a chlorine residual of 2ppm or more. If you suspect that the cloudiness is caused by poor water balance, simply add a pH/alkalinity decreasing chemical until the water comes into balance.
There are a lot of reasons why algae keep returning to pools. The most common of these reasons are: Low levels of chlorine or chlorine getting burned up too fast before it gets the opportunity to kill the algae.
Getting the sparkle
An oxidiser is a product that works to remove and destroy swimmer wastes and organic contaminants in your water, keeping it crystal clear! We suggest BioGuard Lite® as an easy-to-use oxidiser that allows swimmers back in the water an hour after treatment.
'Adding baking soda to your pool will raise both the pH and alkaline level, which will help increase the pool's clarity and improve stability,' she says.
Baking soda, also known as sodium bicarbonate is naturally alkaline, with a pH of 8. When you add baking soda to your pool water, you will raise both the pH and the alkalinity, improving stability and clarity. Many commercial pool products for raising alkalinity utilize baking soda as their main active ingredient.
In general, add one pound of shock to your pool for every 10,000 gallons of water. But if you're experiencing an algae problem, you'll need to add double, triple, or quadruple the amount of shock. Regardless, always follow the manufacturer's instructions when adding pool chemicals to your water.
It's pretty tough to over-shock your pool; shocking your pool two days in a row with the proper dosage for your pool volume shouldn't be a problem – and in fact, is sometimes even needed to rid your pool of algae and other contaminants.
Liquid chlorine and granular shock have the same active chemical that sanitizes your pool, what changes is the strength and the way you use it. Liquid chlorine is less costly, unstabilized and comes in liquid form. Granular shock is stabilized and comes in a solid form that dissolves in your pool.
You should aim to shock your pool about once a week, with the additional shock after heavy use. Some tell-tale signs that your pool needs to be shocked are cloudy, foamy, green, or odourous water.