It’s not useful for what I need: tabs to put on my hot tub dispenser. It’s all broken and powdered.I was very disappointed in this product. I needed small 1" chlorine tablets for a pond dispenser. Although the weight was listed as 1 lb/2 lb, the photo appears like a full-sized tub of chlorine tabs. But this thing was barely 5" in diameter and 6" deep! Far too expensive for what you actually get.The tablets when I resived them about one half of them were all broken they didn't work to goodNot good value for your dollar. One pound container had 20 tablets. $20 cost plus $10 shipping $1.50 per tablet. Each tablet is individually wrapped which makes it difficult and a hassle to use.I put two of these in a very small pool (<800 gallons). There is no measurable chlorine in the pool and I can only get any kind of reading if I put the test strip directly inside the chlorine float. The tablets dissolved in a few hours, not over a week as they should. Mailed all the way from China and impossible to return because they are "dangerous". Took 20 minutes of chatting with Amazon to get a refund. Don't buy.This is as close to a scam as I have gotten on Amazon. If I could give zero stars I would. For my $34 I received 20 tablets. The bucket is 2/3 the size of a peanut butter jar. The tablets were broken. Reading the poorly translated label I learned that these tablets are 50% chlorine, 1% other ingredient for a total of 100%. Do not buy.Clorox tablets last 2 weeks, these tablets dissolve in 2-3 days max! And like another reviewer said it doesn’t even smell like chlorine. Don’t waste your money on this crap product!I don't know what this is, but it is not chlorine. Doesn't smell like chlorine, and dis not raise the chlorine levels in my pool. What a waste of money and time.