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

Works really well. It's chlorine....what more can I say

OUTSTANDING customer service! Remedy was above & beyond. This is a great product. I have ordered this in the past with excellent results & needed to restock when I opened my pool. Works well keeping pool water clean. Dealing with a seller with integrity makes it even better. Highly recommend. I will definitely reorder regularly.

DO NOT BUY THIS STUFF, PLEASE LISTEN TO THE NEGATIVE REVIEWS. I do not leave many reviews but i had to for this. You get what you pay for. First off it is like a solid block and you have to scrape it with a metal garden shovel to break it up. There are pieces of black plastic throughout. When you use it, this stuff is worthless. It clouds the water, it does not dissolve, it leaves little white particles floating on the surface of the pool and most of it sinks to the bottom, which in turn clogs up the filter. The worst part is it does not work!!! I used 3 times the recommended amount and the chlorine test still showed under 1 PPM. I do not know what is in this but it does not do anything. Water stays green tint until I use a different product. A one pound bag of shock of a different brand or a jug of liquid chlorine does way more than 6 pounds of this stuff. I have never felt more ripped off by any item i have bought. Amazon should stop selling this stuff, it is a rip off.

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!

This is not chlorine powder, it is granular chlorine, it doesn’t dissolve well in the pool. After putting a few “chlorine stains” in my pool, I started dissolving this stuff in a bucket of water, stirring it up for 5-10 minutes and then pouring in the mix. I’d rather have the powder. It sanitizes well, but… stains.

I just wish it had had a proper measuring cup for the average 1 pound shock bag equivalent in the bucket. I took a one pound shock bag I had remaining and poured it into a measuring cup and marked where it filled to to make the equivalent product. Now I do not need one in the bucket! I could find more to complain about, but frankly the product works great and I should take an oppurtunity now to experiment with the right amount of volume of material to get the desired CL level rather than using, "the one bag after rain, two starting to go green", mantra. This is my first go round bying loose CL for shock rather than the bags which have doubled in price twice since 2020. I figure 100 pound ought to keep me going with my little pool for quite some time. The price is awesome and if I had more use for it I'd have bought a second bucket as a hedge against inflation.

The filler used does not dissolve and leaves a film of sediment on the bottom of the pool. When this sediment gets stirred up, it makes the water extremely cloudy.

I absolutely love your product. I’ve been using it for over two years. It’s the best that I think is on the market the square bucket that it comes in is a little cumbersome, but it’s doable. Once you get the hang of it other than that amazing product five stars across the board.