Model # R20841
Alternate Part #'s 71428, LZA71428A
Power Blast Cal Shock 65 is 68%CalciumHypochlorite 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'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.
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 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
My pool company recommends using a phosphate remover. Do you have any such item?
4 to 8 hrs
I made sure that the pool pump was on high and was running well. I cleaned the pool walls and brushed the algae to the deep end of the pool. I cut open twelve bags of Power Blast Pool Shock, empty the contents in a bucket and spread the Shock over the pool water. While everything was working, I used my brush to clean the steps in the pool and re-brushed the walls and bottom again.
Less than 1 hr
1 to 2 hrs
A ladder to stand on to brush the pool sides down.
Opened the pool and my son vacuumed the crud to waste. I added my stabilizer and let that filter for 48 hours. I brushed down the walls of the pool and added two pounds of Power Blast Shock to my pool and Super Algaecide, approximately 6 ounces and let filter for another 48 hours. Then I backwashed the system to clear the algae and rinsed the sand in the filter. It's been kind of cold here so I haven't been able to get in and vacuum yet, but there is very little left in the center of the pool to vacuum up. So the steps went into the pool yesterday and I will shock it again this evening and let filter again for 24 hours. I will vacuum, backwash, check the levels to make sure I'm oaky and then put the solar blanket on for the next couple weeks.
Less than 1 hr
I had a high combined chlorine count after having the test run locally at a hardware store. I use this product and it worked fantastically. I did dissolve it in a pill first but it says about 15 minutes and poured directly into the pool.
More than 8 hrs
Once I uncovered my pool the water was a nasty green and full of leaves. When I first used the shock all of the leaves on the bottom came to the top, making scooping a breeze. Now the water is clean and ready to go.
4 to 8 hrs
Less than 1 hr
Scissors to open the shock
I got rid of my old Chlorinator and installed a Rainbow 300-19 in it's place. I also switched from my old Shock and started using Robarb Power Blast Shock that I purchased from inyopools.com, the same place that I got the new Chlorinator from. PROBLEM SOLVED! I keep the Chlorinator on 1, and when the chlorine get's a little weak, after a week or so, I broadcast 1 bag of shock over the deep end of my pool and it snaps the chlorine right back to where it should be.