Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment for Swimming Pools, 1-Pound, 24-Pack

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 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.

This product is an excellent choice for pool maintenance. It's much better than shock with stabilizer, in my opinion. Here's why: - Using shock with stabilizer in it for extended periods will cause your cyanuric acid levels to rise above limits and leave your chlorine ineffective (useless, if high enough). - Calcium Hypochlorite is a better product than stabilized chlorine, and it's normally much more expensive than stabilized chlorine. It's only cheaper now because resellers bought out the stabilized shock and are now reselling it to you at a significant profit) - To use Calcium Hypochlorite, just stabilize your pool with cyanuric acid (available on Amazon). Once you reach the desired PPM (parts per million), you won't have to add any more. It does not evaporate (which, btw, is the problem with stabilized shock ... you keep putting in more cyanuric acid every time you shock). - Important: get your PH up to 7.4 (7.2 - 7.6), and keep it there, and your algae problems will diminish significantly. - Also, treat your pool with algaecide to keep algae from growing. Shock will kill algae, but its purpose is to kill harmful bacteria. Algae is just annoying

Higher active ingredient than store bought. Seems to work fine and about 1/2 the price.

Good product at fair price compared to other places.

I recently tried DryTec 1-1901-24 Calcium Hypochlorite Pool Shock for my swimming pool and was quite impressed with the results. This pool shock effectively eliminated algae and bacteria, restoring the water to a crystal-clear state. The fast-dissolving granules made application quick and easy, and I noticed a significant improvement in water clarity shortly after treatment. I also appreciated the product's ability to maintain the chlorine levels in my pool, ensuring that the water remained safe and hygienic for swimming. The shock's long shelf life allowed me to store it for extended periods without worrying about its efficacy diminishing over time. Overall, I found DryTec 1-1901-24 Calcium Hypochlorite Pool Shock to be a dependable and effective solution for pool maintenance. It provided the sanitizing power my pool needed, and I would certainly recommend it to other pool owners looking for a reliable pool shock treatment.

Fast free delivery with a order of $35 or more. Product has helped clear my pool of pollen and green algae. Note, you should add this shock treatment after the sun starts setting down and run the pump till the next morning. I use 1 bag (one pound) per 10,000 gallons of water. 40,000 gallon pool equals 4 ( 1-pound ) bags. After a couple of days of running the filter you will start to see clumps of dead algae on the bottom of the pool and then you need to vacumn the entire pool to remove the dead algae. Next back wash your sand filter about 1 and a half minutes or more depending on how much algae your pool had until the dicahrged water is starting to clear up. Repeat the vacuming process for a couple of days until your backflush water is clear.

Most shock packs are much more expensive for the same thing. Pool shock is a must in sunny, hot areas with lots of birds. I just dump this shock evenly across the deep end of my pool and the pump takes care of the rest. Use as directed (at night with pump running) and remember that this only kills the algae. You need to vacuum the pool after the shock kills the algae, & be sure to backwash your filter (if you have a sand or DE filter or clean the filter if you have a cartridge filter) if your pool started off cloudy and green. If your pool is already blue and clear, then just use it once a week to keep the chlorine levels within 1-3ppm.