How large are the tabs (3 inch or smaller) and how many tabs in each 50 lb bucket?

Granules are not tabs. They are coarse particles, about the consistency of hominy grits. There are probably several million granules in a 50 lb. bucket. I'm going to go out on a limb here and estimate that there are 50 lbs of them. What I do is fill the scoop (it comes inside the bucket) with granules, get 1 to 2 gallons of water from my pool in a 5 gal. plastic bucket and pour in the particles. I stir them around with a stirrer made of a short length of PVC pipe and break up any clumps that have formed over time. I pour the slurry into the pool at several different points. The granules are not stabilized chlorine (which most tabs are) but calcium hypochlorite (same chemical as bleach).

I feel dumb, but I can't figure out how to open this bucket. I've tried jostling the red tab and turning but to no avail. Any tips?

I had this issue the first time as well. Examine the red lock tab to see how it locks into place by falling into those holes. You need to pull up on that. Thing is, mine had already been pulled up. So instead of concentrating my energy on that I stood up, grabbed the top of the bucket with both hands and turned it left in order to open it. Simply grabbing it from the side with one hand was not enough the first time so you'll need both hands and grab from the top. Have another person hold the red tab up at the same time and it should open easily.

Does this product contain a cyanide-based UV stablizer?

It does not contain stabilizer.

can be used for potable/drinkable water and if it falls under NSF Standard 60?

Haha! That's a good one! It works great for pool water.

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In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds

In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds

Product ID: 421265071

Details

Brand
In The Swim
Item form
Granular
Item weight
11.34 kg
Product benefits
Kills Bacteria
UPC
815100020700

⚡68% Calcium Hypochlorite for rapid sanitizing

💧1 lb per 10,000 gallons dosage for precise treatment

🛡️Eliminates bacteria, algae & microorganisms fast

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VT68353

Duties & taxes included

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Shock your pool into perfection—because clear water is the new status symbol!

VERSATILE USE - Perfect for pools, spas, and hot tubs—your all-in-one water defense.
NON STABILIZED FORMULA - Super shock your water without cyanuric acid buildup—maintain peak pool health.
PRECISION DOSAGE CONTROL - 1 lb per 10,000 gallons ensures efficient, no-waste treatment every time.
POWER PACKED SANITIZATION - 68% Cal-Hypo delivers rapid, deep-clean chlorine shock for crystal-clear water.
ALGAE BACTERIA ERADICATOR - Kills stubborn algae blooms and harmful microbes to keep swimmers safe.

In The Swim Pool Shock features a powerful 68% Calcium Hypochlorite formula that rapidly eliminates algae, bacteria, and microorganisms. Designed for pools, spas, and hot tubs, it offers precise dosing at 1 lb per 10,000 gallons to maintain crystal-clear, safe water. Its non-stabilized formula prevents cyanuric acid buildup, making it ideal for both routine maintenance and super shocking treatments.

Specifications

ASIN	B002WKJ6IS
Brand Name	In The Swim
Customer Reviews	4.6 4.6 out of 5 stars (614)
Item Form	Granular
Item Weight	11.34 kg
Manufacturer	In The Swim Discount Pool Supplies
Product Benefits	Kills Bacteria
UPC	815100020700
Unit Count	11829.4 Milliliters

Reviews

J**F

I’ve always been happy with In The Swim pool products and this is no exception. This along with a stabilizer keeps my chlorine levels in check. Tablets are made strong enough so that there is minimal breakage. They last a long time without breaking down.

26.02.2026

S**T

Very comparable to name brands it removes algae and keeps algae out of your pool keeps chlorine levels where they need to be and the durability is great

14.02.2026

A**R

Ordered a pail of shock as it was on sale. Delivered on time and in good condition. This was a great buy. No photo as it is just a pail of shock. I do like using this brand of shock.

1.01.2026

V**D

My pool was green as grass.. With all this rainy weather I was having a hard time working on it. When the acid came I added 2 cups to the deep end and 4 cups chlorine. It started changing colors the next day. I have continued to use the chlorine wit a little less acid and now I can see the bottom in the deep end. I will continue to use this method until I get the pool clean.

15.06.2025

A**A

Excellent product and customer service.

7.11.2025

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