Calcium Hypochlorite Granular for Swimming Pools, 1lb (Pack of 24)

I did a lot of research before I purchased this DryTec brand of hypochlorite chlorine pool shock. I usually use “In The Swim “brand of chemicals in my pool but when I was on Amazon I came across the DryTec . It got great reviews. I used my perplexity AI search engine and googled it as well. Nice high quality product works well . It’s 68% Calcium Hypochlorite. So it’s nice and strong. It keeps my water crystal clear. It’s very easy to use. I have an in ground gunite pool so I just open the bag and disperse it over the water in my deep end.My pool had 33,000 gallons of water so I use 3 one pound bags per application. I usually use it preventively once every 4 weeks. I don’t understand what a company that makes compressed air equipment has to do with pool chemicals but this company makes a great pool shock. I get the 24 pack size it was $114 last time I ordered it which is a great price. It’s is as good or better than the In The Swim shock I use to use.

I travel frequently, sometimes for extended periods of time, which makes pool maintenance without hiring a service a real pain. This is particularly troublesome with an in-ground pool in Florida in Summer that has no shade. I waited to post a review until after I'd ordered 2 separate batches to test for quality control, and quite simply: this is the BEST shock I've ever used. I've come back from trips to solid green slime pits with heavy stripes of the dreaded black spot algae, and 2-3bags of this stuff + a couple of chlorine tablets with the filter running will turn my pool back to blue overnight. Like other reviewers, I have noticed that my water is a little cloudy the next 24-32hrs--- but in my case, I chalk that up to so much dead organic material & algae that needs to be filtered out. This stuff kills ALL the nasty stuff--- but until it's vacuumed or filtered out, it's still in the water. It works when nothing else does, and does a better & faster job. It's also priced very competitively. If you have a problem pool, or a problem with regular maintenance, this stuff is AMAZING. It terminates even the most durable, hardened, and persistent algae with extreme prejudice, you just have to give your vacuum or filter a chance to clear the battlefield of all the millions of algae corpses once it's finished annihilating them, and then declare unconditional victory. If you're just looking for regular pool maintenance, this may be a little strong for your needs. I will say that when I'm around to take care of it, one bag of this every 2-3 weeks, plus a couple of chlorine tablets does the trick (without cloudiness). Where it really shines though is in rehabilitating seemingly terminally green monsters back into beautiful blue pools.

I love this shock! I have used plenty of other brands and nothing I have used seems to work quite as well as Drytec does. In only about 7 to 10 minutes, see the difference between the first two pictures. The next day my pool is totally clear and blue again, amazing! My pool is roughly 33,000 gallons and I used (3) of the 1lb bags.

I have bought this 6 times. It would get 5 stars if it dissolved better but it does as intended

Awesome product. A deal for the money.

Powerful and Reliable Pool Shock for Crystal Clear Water This 24-pack of Drytec 1-pound calcium hypochlorite bags has been a real workhorse in keeping my pool sparkling. Each bag is individually sealed, making it simple to grab one, cut it open, and pour without mess. I like that the packaging is compact and easy to store in the garage, and the dosing is straightforward—one bag at a time keeps me from over- or under-chlorinating. Performance-wise, this shock works quickly. I usually add it in the evening, and by the next morning the water is clear, bright, and free of that slightly cloudy look that creeps up during heavy use. It’s strong enough to handle algae blooms after a stretch of hot weather but doesn’t leave any noticeable residue once fully dissolved. A couple of things to keep in mind: this is calcium hypochlorite, so it does raise calcium levels over time. That isn’t a problem for me since my pool water tends to run soft, but if you already have high calcium hardness, you’ll want to monitor it to avoid scaling. Also, because it’s strong, I always pre-dissolve in a bucket and add it slowly to avoid bleaching spots on the liner. Bottom line: A reliable, cost-effective pool shock that’s easy to use and keeps water crystal clear—just keep an eye on calcium levels if your pool runs hard water.

I always read reviews before making a purchase on Amazon. That’s one of the reasons I shop here. This pool shock is an excellent product. I know I’m being price gauged with both the shock and the chlorine tabs. There is no excuse for that. Thankfully, we are all free to shop for better prices. Although still pricey, it beats most competitors. This product easily dissolved in my pool, just like it should do. I had an algae problem because my brand new motor was circulating too low. I had no water movement. There’s always a reason for algae. After scrubbing the sides many times and working like a Trojan, I added 2 packs of this stuff one day, and 3 packs the next. I got my motor reset, thank you EPA for trying to help me. Yuk, I don’t care how many hours or at what speed I need to have clear water, but stop helping me, PLEASE!!!! This product is great. Don’t hesitate!!!!

TO AOID ANY BURNS TO LINER PUT 2-3 LBS DRY-TEC IN 5 GALLON OR LARGER BUCKET. FILL WITH WATER FROM POOL WITH ANOTHER BUCKET OR HOSE ETC. STIR VIGOROUSLY WITH A PIECE OF WOOD F A EW SECONDS . LET SIT A MINUTE OR TWO. POUR OFF ABOUT 3/4 OF WATER BACK INTO POOL RETURN AREA WHILE FILTER RUNNING. RE-FILL AND REPEAT. UNTIL NO CL RESIDUE IS LEFT IN BOTTOM OF BUCKET