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Pool Shock by Aqua Org Plus - 65% Granular Cal Hypo - Swimming Pool Shock for In-Ground, Above Ground, Spas & Hot Tubs - 50 Pound Pail

4.0 out of 5 stars 871 ratings

$159.00 $0.18 per fluid ounce
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Size: 50 Pound Pail
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Purchase options and add-ons

Brand AQUA-ORG PLUS
Item Weight 55 Pounds
Item Form Granular
Product Benefits Eliminates algae, restores water clarity, and raises chlorine levels, trusted by pool maintenance experts for various pool types See more
UPC 810100711405

About this item

  • PRODUCT SPECS: 50 pound bucket of Aqua Org Plus calcium hypochlorite (pool shock). Works in in-ground, above-ground pools, spas and hot tubs. 65% Cal Hypo Granules. Great for regular maintenance.
  • KEY FEATURES: Fast acting Aqua Org Plus calcium hypochlorite & professional-grade formula tackles algae blooms, restores water clarity, raises chlorine levels to eliminate unwanted contaminants. Professional formula trusted by pool maintenance experts. Solves 90% of pool water problems.
  • DIRECTIONS: Ensure the pool filter is running. Measure (1lb for 10,000 gallons of water) & pour Aqua Org Plus cal hypo into water directly. Distribute evenly. Use a pool brush to ensure granules dissolve into the water and aren’t sitting on the bottom of the pool. Ensure proper circulation and avoid swimming until chlorine returns to 1-4 ppm.
  • BENEFITS: Non-stabilized Aqua Org Plus formula (no CYA’s) to prevent chlorine lock. Effective for all swimming pool types including pools with liners, gunite pools, and saltwater pool systems. Regular testing of pool water and maintenance are essential for optimal shock treatment results.
  • BEST PRACTICES: Keep Aqua Org Plus products out of reach of children. Avoid direct contact with skin and eyes. Use in a well ventilated area. Store in a cool dry place, away from sunlight. Follow guidelines and usage instructions provided by the manufacturer. Do not add directly into the pool floater or skimmers.

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This item: Pool Shock by Aqua Org Plus - 65% Granular Cal Hypo - Swimming Pool Shock for In-Ground, Above Ground, Spas & Hot Tubs - 50 Pound Pail
$159.00 ($0.18/fluid ounce)
Get it May 9 - 12
In Stock
Ships from and sold by Pyrock Chemical.
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$194.99 ($0.24/ounce)
Get it as soon as Tuesday, May 6
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Ships from and sold by In The Swim Pool Supplies.
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$14.88 ($0.12/fluid ounce)
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Product Description

Cartoon Pyrock cal hypo

element bonds

Professional Grade Formula

This potent formula is specifically designed for rapid and effective algae control, ensuring a clear and inviting swimming environment.

Cal Hypo Application

Shock Treatment

Ideal for periodic treatments, this product is a powerful solution to combat algae infestations and maintain pristine pool water.

hot tub lifestyle

Versatile Application

Can be used to raise chlorine levels, eliminate contaminants, and break down chloramines.

before after pool cal hypo
Granular Calcium Hypochlorite (Shock) 1lb - 12pack by Aqua-Org Plus
Granular Calcium Hypochlorite (Shock) 1lb - 24pack by Aqua-Org Plus
Granular Calcium Hypochlorite (Shock) 55lb Pail by Aqua-Org Plus
Granular Calcium Hypochlorite (Shock) 100lb Pail by Aqua-Org Plus
Customer Reviews
4.0 out of 5 stars 871
4.0 out of 5 stars 871
4.0 out of 5 stars 871
4.0 out of 5 stars 871
Price $51.95 no data $159.00 no data
Algae Control
Fast Acting
Multi Purpose: Works in Pools (In-ground & Above Ground) & Spa's
Shock Treatment
Total Weight 12lb. (5.4kg) 24lb. (10.8kg) 55lb. (24.9kg) 100lb. (45.3kg)
Packaging Individually Bagged Individually Bagged Bulk Pail Bulk Pail

Product information

Brand AQUA-ORG PLUS
Item Weight 55 Pounds
Item Form Granular
Product Benefits Eliminates algae, restores water clarity, and raises chlorine levels, trusted by pool maintenance experts for various pool types
UPC 810100711405
Global Trade Identification Number 00810100711405
Number of Items 1
Unit Count 880.0 Fl Oz
Product Dimensions 15.5 x 13 x 13 inches
Item Weight 55 pounds
Manufacturer Organic Industries
ASIN B0BRW7SPY9
Country of Origin India
Item model number 065
Customer Reviews
4.0 out of 5 stars 871 ratings

4.0 out of 5 stars
Best Sellers Rank #1,455 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
#24 in Swimming Pool Chlorine

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Pool Shock by Aqua Org Plus - 65% Granular Cal Hypo - Swimming Pool Shock for In-Ground, Above Ground, Spas & Hot Tubs - 50 Pound Pail


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Pool Shock by Aqua Org Plus - 65% Granular Cal Hypo - Swimming Pool Shock for In-Ground, Above Ground, Spas & Hot Tubs - 50 Pound Pail
AQUA-ORG PLUS Pool Shock by Aqua Org Plus - 65% Granular Cal Hypo - Swimming Pool Shock for In-Ground, Above Ground, Spas & Hot Tubs - 50 Pound Pail
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Price$159.00$259.99$269.99-9% $264.99
List:$289.99
-23% $74.99
List:$97.49
$184.99
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Get it May 9 - 12
Get it May 7 - 8
Get it as soon as Monday, May 5
Get it as soon as Tuesday, May 6
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Important information

Directions

Ensure the pool filter is running. Measure (1lb for 10,000 gallons of water) & pour into water directly. Distribute evenly. Use a pool brush to ensure granules dissolve into the water and aren’t sitting on the bottom of the pool. Ensure proper circulation and avoid swimming until chlorine returns to 1-4 ppm. Keep out of reach of children. Avoid direct contact with skin and eyes. Use in a well ventilated area. Store in a cool dry place, away from sunlight. Follow guidelines and usage instructions provided by the manufacturer.

Customer reviews

4 out of 5 stars
871 global ratings

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Customers say

Customers find the pool shock to be a great deal for a 12-pack and say it works well for their pools. The water clarity receives mixed feedback - while some report crystal clear water, others mention it clouds the water for a substantial time. Customers disagree on the product's quality, with some describing it as good while others find it bad for pools. The chlorine level and dissolving performance are also mixed aspects, with some praising the chlorine content while others report low levels, and many noting it doesn't dissolve well. Customers find the product extremely difficult to open.

AI-generated from the text of customer reviews

115 customers mention "Value for money"94 positive21 negative

Customers find the pool shock to be a great value, particularly praising the 12-pack option and the amount of chlorine it provides.

"...We have used many different suppliers but this is best. Value, ease and convenience. Thank you very much and we will order from you again!" Read more

"...You could probably also use a paint can opener. Price was EXCELLENT, delivery quick and the product works. Enjoy your pool!" Read more

"...Sure, great price for so much cal hypo, and if it worked itd be a steal...." Read more

"...I'm on the third bucket, in almost two years. So very good value...." Read more

97 customers mention "Effectiveness"68 positive29 negative

Customers report that the pool shock works incredibly well, with one customer noting it performs as effectively as brand-name alternatives.

"...Works like a charm. You could probably also use a paint can opener. Price was EXCELLENT, delivery quick and the product works...." Read more

"...and pool is still pretty cloudy and murky looking, my pump and filter are all working fine...." Read more

"Bulk shock, self explanatory" Read more

"First of all, you cant beat the price. Works as intended . All the conplainers here dont know what they are doing. Its hard to open lid?..." Read more

61 customers mention "Water clarity"21 positive40 negative

Customers have mixed experiences with water clarity after using the pool shock, with some reporting crystal clear water while others experience cloudy water.

"...like some had said it takes, its now 72 hours later and pool is still pretty cloudy and murky looking, my pump and filter are all working fine...." Read more

"...The granules started dissolving immediately and the water became cloudy within minutes as the chlorine dispersed into the water...." Read more

"...There goes the moisture seal! 3. The lid is from the 19th century press seal type. It seals tight but very hard to open on a weekly use basis...." Read more

"...Overall, while the strength of the shock is good, the cloudiness and plastic contamination were major drawbacks...." Read more

54 customers mention "Quality"36 positive18 negative

Customers have mixed opinions about the pool shock's quality, with some finding it great while others describe it as terrible.

"Product is good but the plastic bag that lines the buckets falls apart so you have a bunch of plastic shards mixed in with the product." Read more

"...The price is great the product’s good." Read more

"...It is worse than the driveway sealer bucket. Good hand exercise though! 2...." Read more

"Great price for 65% cal hypo. The lid is truly impressive on how difficult this thing is to open...." Read more

36 customers mention "Chlorine level"16 positive20 negative

Customers have mixed experiences with the pool shock's chlorine content, with some finding it excellent while others report it being low and failing to meet pool chlorination standards.

"...to clear the fliter every year, and there will be a lot of calcium (?) deposit in the filter. I'm on the third bucket, in almost two years...." Read more

"...I am very pleased with the speed and efficiency of this chlorine powder, and there is no beating the price...." Read more

"...Be careful where you store accelerants/flammables as cal hypo is an oxidizer, meaning it lowers ignition temps of other chemicals, among other..." Read more

"...Ca-hypochlorite is soluble in water. It's not causing the cloudiness. It's not clear what is happening but it's one of two things...." Read more

21 customers mention "Strength"13 positive8 negative

Customers have mixed opinions about the pool shock's strength, with some finding it good quality while others warn not to buy it as it's not strong.

"...The plastic tub was in good condition with no cracks or leaks...." Read more

"...opening was surprised to see the granulars in a plastic bag which was brittle and ripped in my hands as i open it...." Read more

"...There goes the saving! 7. The sturdy wire handle may not be a bad thing, at least it won't break like the plastic one...." Read more

"...This shock works great. It seems to be stronger than the bagged shock to me. I use 4 scoops to super chlorinate our 16,000 gallon pool." Read more

49 customers mention "Dissolves well"12 positive37 negative

Customers report that the pool shock takes quite a while to dissolve and clear the water.

"...Its hard to open lid? transfer it to different container. Hard to disolve? You not just dumping clorine in pool...." Read more

"...chlorine, but this doesn't work with this product, as it does not dissolve that fast. SO looks like dissolving on a bucket is the way to go." Read more

"This shock dissolves quickly and doesn’t contain stabilizer which can lead to chlorine “lock”...." Read more

"Didn't dissolve. Sat in bottom of pool" Read more

26 customers mention "Difficulty to open"4 positive22 negative

Customers find the pool shock extremely difficult to open.

"...Container can be difficult to open but not as difficult as some other chlorine containers I’ve had in the past...." Read more

"...All the conplainers here dont know what they are doing. Its hard to open lid? transfer it to different container. Hard to disolve?..." Read more

"...It seals tight but very hard to open on a weekly use basis. Have a heavy duty screw driver handy to do some hand and finger exercise...." Read more

"First off the lid is a difficult to open. But it shouldn’t be too much of an issue if you have ever opened a paint can...." Read more

Good price but you get what you paid for!
4 out of 5 stars
Good price but you get what you paid for!
I would like to echo the comments from most customers with the hacks to workaround the shortcomings. 1. Horrible lid and a badly designed tab that required heavy duty screw driver and piler to remove. It is worse than the driveway sealer bucket. Good hand exercise though! 2. The plastic bag inside the bucket to hold the chlorine shock corroded and broke into 2 pieces. There goes the moisture seal! 3. The lid is from the 19th century press seal type. It seals tight but very hard to open on a weekly use basis. Have a heavy duty screw driver handy to do some hand and finger exercise. I'm thinking about transferring all the shock powder to an empty bucket with a screw type lock lid for 21th century use. 4. There is no scoop inside the bucket. Again, save the old one or use an old measuring cup. 5. No mention of available chlorine on the label, the listing said 60%. So, use more since it is cheaper. 6. Probably no stabilizer in the shock, need to buy it separately! There goes the saving! 7. The sturdy wire handle may not be a bad thing, at least it won't break like the plastic one. Put a slit opened short PVC pipe on it or wear glove. 8. The shock dissolved quickly in a 3-gallon bucket of water than other famous brands I used before. It leaves almost no residue which is a good thing and won't hurt the liner as much. Overall not a deal breaker but there are things for improvement going forward. Keep the price low, that's all it counts!
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Top reviews from the United States

  • Reviewed in the United States on April 15, 2025
    Size: 50 Pound PailVerified Purchase
    We have a very large swimming pool in our backyard and we take care of cleaning and care. Chlorine is a very important ingredient in that process. We have used many different suppliers but this is best. Value, ease and convenience. Thank you very much and we will order from you again!
  • Reviewed in the United States on June 9, 2024
    Size: 50 Pound PailVerified Purchase
    This shock dissolves quickly and doesn’t contain stabilizer which can lead to chlorine “lock”. Container can be difficult to open but not as difficult as some other chlorine containers I’ve had in the past. The really cool thing about this chlorine is that the granules are in a plastic bag within the buckets so you have two opportunities to ensure that the product stays dry and airtight. If you’re new to pools and chlorine, this is important! I made the mistake one year of not ensuring that the container (another brand) was not tightly closed (mainly because it was hard for me to open) and left it in my shed over the winter like that. HUGE mistake. When I went into the shed in the spring, the chlorine smell was AWFUL and worse than that, everything in the shed made of metal was totally corroded. Lesson learned $$$

    Anyhow, to make reopening the bucket easier, I use the flat end of my corkscrew. Works like a charm. You could probably also use a paint can opener.

    Price was EXCELLENT, delivery quick and the product works. Enjoy your pool!
    5 people found this helpful
    Report
  • Reviewed in the United States on October 22, 2024
    Size: 50 Pound PailVerified Purchase
    Amazon should be ashamed of themselves for letting this be sold and not returnable. I have contacted the mfg and will update this accordingly if they help.

    Sure, great price for so much cal hypo, and if it worked itd be a steal. I didnt have the problem that many talked about with the tub being hard to open, they sent me the square bucket and it was pretty easy to open, the plastic bag inside was still intact so that part is fine too. However, when i dumped it in the pool, i had dissolved it like i had read from a bunch of reviews, put 2lbs of shock in and instantly turned the whole pool cloudy where i couldnt see the bottom, figured, "no problem", i'll give it 24hrs like some had said it takes, its now 72 hours later and pool is still pretty cloudy and murky looking, my pump and filter are all working fine. If it was returnable, i wouldnt care but unless the company does something, Amazon wont so i'm out the $ and stuck with a crap product. Spend the extra $ and buy something reputable.
    4 people found this helpful
    Report
  • Reviewed in the United States on June 1, 2024
    Size: 50 Pound PailVerified Purchase
    First of all, you cant beat the price. Works as intended . All the conplainers here dont know what they are doing. Its hard to open lid? transfer it to different container. Hard to disolve? You not just dumping clorine in pool. Disolve it in bucket first and after pour it around edges in pool, especially if you have pool liner. At the same time make sure your pump is running and let pool robot work as well. It will help to distribute the undersolved granules.
    13 people found this helpful
    Report
  • Reviewed in the United States on April 22, 2025
    Size: 50 Pound PailVerified Purchase
    It definetly works. You need to use a bit more of this one than the regular 68% calcium hypoclorite. But the problem I see with this is that it clogs the filter... You need to clear the fliter every year, and there will be a lot of calcium (?) deposit in the filter. I'm on the third bucket, in almost two years. So very good value.

    I used to use an old sock on the pump outlet to dissolve chlorine, but this doesn't work with this product, as it does not dissolve that fast. SO looks like dissolving on a bucket is the way to go.
    One person found this helpful
    Report
  • Reviewed in the United States on August 26, 2024
    Size: 50 Pound PailVerified Purchase
    As others have said, the manufacturer is definitely saving on the packaging here. The bucket lid must be cut off in order to be opened. Not hard to do with a box cutter. Thing is, the lid also doesnt seal now so I have to stack something heavy on top to keep the thing sealed.

    But Id say it’s worth it. This was far and away the cheapest I could get any kind of pool shock on a per ounce basis. And the stuff works just as well as anything else Ive tried. Be careful where you store accelerants/flammables as cal hypo is an oxidizer, meaning it lowers ignition temps of other chemicals, among other things.

    All told with how crazy chlorine costs have been, Im very happy with the product.
    One person found this helpful
    Report
  • Reviewed in the United States on March 20, 2025
    Size: 50 Pound PailVerified Purchase
    Product is good but the plastic bag that lines the buckets falls apart so you have a bunch of plastic shards mixed in with the product.
    Customer image
    3.0 out of 5 stars
    Good product bad container

    Reviewed in the United States on March 20, 2025
    Product is good but the plastic bag that lines the buckets falls apart so you have a bunch of plastic shards mixed in with the product.
    Images in this review
    Customer image
    One person found this helpful
    Report
  • Reviewed in the United States on March 28, 2025
    Size: 50 Pound PailVerified Purchase
    Excellent product to get rid of Algae in the pool