I drain my pool 2 months ago because of high cyanuric acid. I noticed the pool was still getting algae so I went to do a test at Leslie's pool and they informed me that cyanuric acid was too high again. So I did a little research and found out that it was this shock that I been using. This is the worse shock I ever used. Never again!! I have to drain my pool again because of this!

Thanks for putting this product on sale. Chlorine tablets have beeen extremely expensive in the past 4 years. It was nice to have a sale on this product.

Excellent tablets. Works very well for our chlorinated pool. The only negative comment I have is in regards to the price. We have bought these tablets for years and watched the price jump to over double.

Chlorine is still outrageously expensive, but Sams is cheaper than most. The 3" tablets are now individually wrapped which is nice... helps keep them fresh I suppose.

Best value in stores or online. Only problem was this time, several packs were linked together and several tablets where chipped or crumbling. Does not effect the overall use, but messy, no one wants chlorine dust on their clothes.

Have used this for last four years and love that the chlorine tablets are individually wrapped, easy to open each package, and seems to last pretty well in the chlorinator.

Pool guy here. This product contains trichloro-s-triazinetrione (i.e. trichlor) which is a pool sanitizer that releases chlorine into your pool water for the purpose of killing bacteria and preventing algae from forming. Trichlor is designed to be used in freshwater and saltwater pools - and pools having vinyl and gunite surfaces. TriChlor tablets have an available chlorine content of about 90% which is quite good when compared to other pool sanitizers such as Cal-Hypo and Sodium Dichlor. Trichlor tablets also contain something called CYA or cyanuric acid which acts as a stabilizer or conditioner that helps protect the chlorine in your pool water from being burned off by the sun. This is a very important feature to know about. Without CYA in your pool water, most of your chlorine will quite literally disappear in a day or less. On the downside, excess levels of CYA will accumulate in your pool water over time as more Trichlor tablets are added. When the CYA level gets above a certain limit (100ppm+), the chlorine in your pool starts to become less effective. This will continue until no amount of chlorine added will be able to disinfect your pool. This is commonly referred to as 'chlorine lock'. The only way to reduce the amount of CYA in your pool water is by partially draining and refilling the pool with fresh water. Please understand, there are many different physical and chemical aspects involved in keeping your pool water clean, clear and safe. Anyone can "shock" their pool. But it takes an understanding of your entire pool environment to effectively treat and maintain your pool safely and economically. Just as important as balancing your pool water chemistry is to ensure your pool water circulation and filtration systems are setup and working correctly. You can have a pool whose water chemistry is perfectly balanced (free chlorine, combined chlorine, pH, total alkalinity, cyanuric acid, calcium, etc) are all within spec. But if your pool pump isn't circulating your pool water properly, your pool will in all likelihood turn green in a matter of days. The same is true for having an ineffective filtration system. If you pool filter hasn't been properly serviced, your filter will get jammed up with bacteria that will contaminate your perfectly balanced and circulating pool water. If you find yourself in a situation of not knowing what you should do, I suggest calling a 'good' pool guy in your area. Ask your neighbors who to call - or who NOT to call! And have him or her come out to help get your pool squared away. And with time, you can start taking over the maintenance and management of your own pool should you decide to do so. My two cents!

I received a 40lb. tub of chlorine dust. Most of the tabs that I pulled out were cracked and disintegrated. Can't pit that in the chlorinator or it will clog it. I ordered for the ease of having it delivered but it would've been better to go to the pool store and get better quality chlorine tabs.Instead I spent a lot of money for garbage tabs that are mostly unusable

I purchased this last week and it was delivered the next day. The tabs were individually wrapped. None of them are broken like other ones that I have bought from Leslie‘s. It is 99% chlorine! Better and less expensive to buy them from Sam’s Very Impressed!!!

I have been using these tablets for our pool for years. Last year I couldn’t get them and got another brand. I had nothing but problems with the pool. I purchased the members Mark brand as soon as I saw they were available! I’ll update everyone once the pool opens up. I’m confident that it was the other brand that wasn’t good! Looking forward to a great summer with a crystal clear pool!!!