You should shock most pools between one and two times per year. This helps restore the pH levels and overall water clarity.
You don't have to shock your pool at all if everything is working all right.
At least once per week.
At least weekly.
The length of time between pool shocks varies. It depends on factors such as how often the pool is used, how many people use the pool and other factors. It is best to have a test kit to check the chlorine level and the pH balance to decide how often to add chlorine or to shock the pool.
How often to shock your pool depends on what the water temperature is and I am assuming you are using chlorine tablets as a sanitizer. If you are using a salt generator you really do not need to shock unless you are starting up for the season or you are having a water quality issue. So here are the parameters for shocking your pool. If your water temperatures are below 50� Fahrenheit you should shock the pool once every 4 weeks. If your water temperatures are 50-69� you should shock the pool every 2 weeks. If your water temperatures are 70� you should shock your pool every week. Shock your pool if you have had a heavy rainstorm where you have to drain water out of the pool. A storm like this will drop algae, food for algae and other contaminates into the pool water. Sock your pool if you have an algae or water clarity problem.
A person should shock their pool right after they fill it up for the first time. This will cut down on bacteria growth that often occurs in un-chlorinated pool water.
Backwash first then shock. If you shock and then backwash you will be throwing away the shock you just put.
Go to your local pool/spa store and they should have Alkaline shock
To get soap out of your pool, shock it.
Every time it gets nasty.
3800 gals of pool water shock it with 1 gal bleach