Size:100 Pound The Zappit 73 Pool Shock is 73% Calcium Hypochlorite with 70% available chlorine. This granular formula comes in a bucket and saves you time and money by quickly dissolving to destroy waste, algae, and bacteria in your swimming pool. This powerful shock treatment is great for spring start up, gives a quick chlorine boost, and helps to balance your pool water chemistry. One pound treats 16,500 gallons of pool water. Use the Zappit 73 Shock Treatment in your swimming pool for more fresh and clear pool water. 2 50 lbs buckets.
S**.
Excellent product
Been using this for several years. Best all around shack.
A**R
Five Stars
very good product. immediately loosened black and green algae, thus easy to brush off.
T**N
Great shock and a great price
Great shock and a great price. Just a few scoops of this for a couple of weeks cured my neglected algae ridden pool which is now a beautiful clear blue.
2**S
Five Stars
great product
A**R
Faster shipping than most providers on Amazon
Seems to work a little better than other chlorine types.
S**Y
Great price
Great price shipped and delivered quickly!
D**T
Five Stars
Very effective and easy to use.
C**Y
Fast delivery good products
Fast delivery good products
Trustpilot
1 day ago
2 weeks ago