Best Pool Chlorine of 2025

"These tablets keep my pool chlorinated without over-stabilizing. The price is a bit better than my local pool store, making this a really convenient option. Just a heads up - the bucket is large and can build up gas if stored in a warm place, so I recommend airing it out outside before opening."

"I switched back to these pucks after trying liquid chlorine, which didn't hold up in the Florida sun. I initially bought some from a local store, but at $7 each, that was too much. I decided to get a 10lb bucket of these and they arrived in perfect condition. My pool looks amazing, and the pucks last longer than those from the store. I’m so satisfied that I’ve just ordered a 50-pound bucket!"

"I've bought the 50 lb bucket a few times now. The first two were flawless, but one I received had every single tablet broken. After I complained, I gave them another chance, and the latest bucket had no issues. I still used the broken ones since they worked, but it was a bit messy. I'm glad the new bucket is much more convenient without the hassle of dust everywhere."

"I’ve found the CPDI Champion Pool Shock to be the best pool shock I’ve ever used! After just one application, my pool was sparkling clear with no algae or cloudiness. It’s incredibly effective and perfect for maintenance or stronger treatments. I highly recommend it!"

"This product worked fantastically for my pond. After spending about $150 on other products, I decided to try this one and was amazed at how quickly my water became clear. Just a heads-up, the two-gallon jugs are a bit heavy, so I needed help lifting them. But overall, great price and an excellent product!"

"I started using this chlorine two years ago, and it’s been amazing! As long as I add it at night and cover it during the day, my pool water stays clear and gorgeous for a long time. I really can’t recommend it enough!"

"This product is easy to use and comes in pre-measured packs. I just sprinkle it around the pool and brush well. It dissolves quickly and keeps my pool crystal clear."

"I've tried various brands, but this one is by far the best I've used."

"This product works great! It keeps my pool clear with no algae growth at all."

"I’m not the most diligent with my pool care, so I often look for effective solutions. I recently had yellow algae, and this product was a game-changer! Just one pack in the deep end, and within a couple of hours, my pool was sparkling!"

“I find that the HTH 42052W Pool Care Chlorine Tabs work exactly as intended. They keep my pool water clear and sanitized all season long, and the added clarifier and algaecide are a fantastic bonus. Plus, the price is excellent for the quality. I definitely recommend them!”

“After my usual chlorine was unavailable, I had to find a replacement quickly. I chose these Advanced tabs based on reviews and I’m beyond impressed. They keep my pool water crystal clear with minimal effort. Since I started using these, I haven’t needed algaecide or clarifier, making them a terrific value. All the tablets arrived fully intact and I’m thrilled to see that HTH still delivers a great product.”

“Using these tablets has been a breeze; we just use one a week! They dissolve quickly and were well-packaged—none of the tablets were broken. It's very easy to use; I just open the package and throw it in!”

"These 3” spa chlorine tablets are just as effective as the more expensive brands, and I find the price to be very acceptable."

"I've switched from Clorox because these tablets work just as well but are available at a better price point and have a less pungent smell."

"So far, they seem to work great in my swim spa. I just put them in the floater and let them do their job."

"I've found these chlorinating tablets to be the best for my saltwater pool. I only use these and I highly recommend them!"

"While these tablets are perfect for our above ground pool, I must say the chlorine smell can be overwhelming, leaving our hair and clothes smelling like it. We had to adjust the quantity to maintain cleanliness. They do last about a week or two before fully dissolving, but I recommend using gloves when handling them because they are quite strong."

"I'm a fan of these tablets! They keep my pool clean and clear, and I've ordered the 25-pound container multiple times. However, my last order was disappointing as every single tablet was crushed. Even the ones that were wrapped were broken. I hope this doesn’t happen again because it leaves a mess when I open the container."

"I recently used HTH 52030 Swimming Pool Care Shock and was very impressed with the results. This product quickly boosted the chlorine level in my pool, leaving the water crystal clear in just a few hours. The process was incredibly easy—just add the recommended amount, and the shock treatment works fast to eliminate algae, bacteria, and other contaminants. Within hours, I noticed a significant improvement in water clarity, and my pool looked fresh and inviting again. Highly recommend HTH 52030 for maintaining a healthy pool environment!"

"I recently purchased the HTH 52037 Swimming Pool Care Shock Advanced and have been thoroughly impressed with its performance. This product exceeded my expectations, providing excellent results at a fraction of the cost compared to local pool stores. The cal hypo formula effectively restores clarity and cleanliness to my pool water. The 12-count pack offers ample supply for regular maintenance and is conveniently pre-measured. I appreciate the simplicity and ease of use, making it a reliable choice for maintaining a clean and balanced swimming pool. Highly recommend HTH 52037 for anyone seeking affordability and effectiveness!"

"Easy to use. Our pool was starting to show signs of algae growth, so my husband needed to shock it. We decided to go with Amazon this time as it was at a lower rate. We shock our 10,000-gallon pool weekly, and it always leaves the water sparkling clean. I say that it lasts about a week before needing to re-shock, depending on how often we use the pool. Makes me want to jump in!"

“I think the chlorine concentration is outstanding in these 3” Trichlor tablets—over 90%. With 1.48 oz providing 1ppm FC per 10K gallons, I’m very satisfied since it doesn’t alter my pH much, reducing the need for muriatic acid.”

“For the price, I find this product quite good. I plan to reorder when needed, although I had some broken tablets. If yours are intact, great; if not, you might feel disappointed.”

“This summer was extremely hot in Phoenix, and these tablets helped keep the chlorine levels steady. I even had to use my waterfall feature to cool the pool. Overall, I believe this is a great deal compared to other options available.”

“I find that this product works as promised, keeping my pool very clean and blue. It acts quickly! However, when I open the container to pour the powder into the water, the dust can irritate my eyes and mouth. I recommend wearing gloves, goggles, and a mask for safety.”

“This chlorine is incredible! It keeps my water clear and a stunning aquamarine blue. However, the container is nearly impossible to open; I have to use a screwdriver to pry it off. After realizing the lid just needs a tab pushed in, it became easier. The product is still amazing for keeping my jacuzzi water sparkling and dealing with biofilm!”

“I have been using Clorox granules for years and have always been satisfied. This year, I tried the 6-pound tub, but it was not the same—the consistency was more like powder than granules. My pool turned green, so I bought the 27-pound tub again and got beautiful water back.”

"I’ve been using this product for three years, and it works great. I can't fathom the complaints, as two packages shock my ~22,000 gallon pool perfectly every two weeks. Living in Oklahoma with summer temps reaching 105-110F, this product handles it with ease. I recommend shocking after dark and broadcasting it into the water stream for total dispersion."

"I buy this whenever the price is right, using it once or twice a week to keep my pool looking good. This allows me to use fewer tablets and helps maintain a lower CYA level."

"I added powdered calcium hypochlorite to my bathwater. While I must be cautious not to get it in my eyes, I find that it’s fantastic for clearing up skin rashes caused by various parasites. I highly recommend it for the body, but I suggest something gentler for the face to protect the eyes."