Model # R20841-6
Power Blast Cal Shock 65 is 68% Calcium Hypochlorite with 65% available chlorine. Our best selling shock treatment, Cal Shock 65 is in a fast dissolving granular form so it quickly destroys organic waste, algae and bacteria saving you time and money.
|Pool Volume in gallons||Amount of Shock needed weekly if pool is clear||Amount of shock needed if pool is green|
|10,000 gallons||1 lbs.||2 lbs.|
|20,000 Gallons||2 lbs.||4 lbs.|
|25,000 Gallons||2.5 lbs.||5 lbs.|
|30,000 Gallons||3 lbs.||6 lbs.|
|35,000 Gallons||3.5 lbs.||7 lbs.|
|40,000 Gallons||4 lbs.||8 lbs.|
*Always follow the manufacturer's recommendations/directions located on the product container.Store any un-open bags in a cool and dry location
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I ONLY HAVE A 1000 GALLON POOL .HOW MUCH SHOCK DO YOU PUT IN EVERY WEEK?
For a 1,000 gallon pool, you would need to add 1.6 oz weekly. If the pool size was listed in error and the pool is 10,000 gallons, you would need to add 1 lb weekly. We also recommend you test your pool water weekly to determine if your chlorine levels are low and require shocking prior to adding Power Blast Pool Shock.
What are the active ingredients of Calshock-65?
Hi Sparky, The active ingredients of the Cal-Shock 65 is Calcium Hypochlorite, 65%.
Does this have algeacide? I want to avoid the ones with algeacide because I want to use it for potable water.
This item does not have algaecide but can kill algae.
When using Blast-it 65 to shock is it best to broadcast around pool?In Skimmer? or dilute in bucket first?
The shock can be added to a bucket of water to pre-dissolve it before adding it to the pool. Shock should NEVER be added through the skimmer.
I constantly have an algae build up in one corner in my swimming pool. What can I do to get rid of it?
I would recommend aiming the return fitting downward and towards the steps. This should help circulate the water around the steps better. I would also recommend brushing down the pool and using a chlorine shock.
When is the right time to shock my swimming pool?
A swimming pool should be shocked every 7-10 days. It is recommended to shock the pool during the evening hours so that the sun doesn't burn off the chlorine.
Is it true that if I have a vinyl pool I can only use liquid shock?
You can use granular or powdered shock with a vinyl pool as well. Before adding the shock to the pool, you want to add it to a bucket of pool water to pre-dissolve it.
My pool company recommends using a phosphate remover. Do you have any such item?
I would recommend using Phosfree. The product container has easy to follow directions and will help you eliminate your phosphate problem.
I have an in ground pool with a mesh winter cover. Several weeks ago, I had added 2 gallons of chlorine to the pool. Since then, with the mesh cover still on, the water has turned green. I've been adding about a gallon of shock each week without improvement. Should I continue adding shock to the pool or should I wait?
I would recommend waiting until the pump and filter are running again before adding any more shock to the pool. Algae needs two things to grow: food and light. With a mesh winter cover, the algae has more than enough light to grow regardless of the shock that you're putting in. Also, shocking the pool without circulation can cause bleaching of the pool surface
Can I add shock through my automatic chlorinator?
No, you should never add shock through an automatic chlorinator. Never mix different types of chlorine. Pool shock can be added to a bucket of water and poured directly into the swimming pool.
I'm looking for pool shock to sanitize my drinking water. Will this work?
I have heard of people using pool shock to sanitize drinking water but I can not promote the use of any pool shock for this purpose. You will want to contact the NSF for further information.
6 of 6 people found the following review helpful:
(4 out of 5 stars) Get ready for economic collapse :)
Reviewed By: Mike from MA ()
Purchased this product for drinking water purification. Good price for what I was looking for. Make sure you know how to use this stuff if you're planning to use it for drinking water.
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(5 out of 5 stars) Great Pool Cleaner
Reviewed By: Jody N. from Manton, MI ()
Pros: Individually packaged in one pound. Easier to store.
Awesome product and shipping was very quick. You can not get this high of a quality product at the big box stores.
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(5 out of 5 stars) Clear as crystal
Reviewed By: Robert R. from San Diego, CA ()
Pros: water clarity
My personal standard for water clarity is my dime test. I have a dime epoxied to the bottom of the deep end of the pool. If I can clearly see the face on the dime, then the water is clear. Zappit Pool Shock gets the job done using less shock than other brands. Costs less, too.