HTH 42049, Pool Care 1" Chlorine Tabs, 1.5 lbs

I bought these 1-inch HTH chlorine tablets for my pool, and they have worked very well. They are easy to use, dissolve evenly, and help keep the water clean, clear, and algae-free. I like that they also contain a clarifier, which makes maintenance much easier. Since I started using them, the water has stayed crystal clear for longer, and I haven't had any issues with bad odors or cloudy water. The packaging is convenient, and the product offers great quality for the price. I would definitely buy them again and recommend them to anyone looking for an effective solution for pool care.

I bought these HTH tablets to use as more affordable refills for the Fluidmaster Flush-n-Sparkle toilet cleaning system. If you are unfamiliar with this system, I would encourage you to investigate it or others like it. I can confirm that four of these 1" chlorine tablets fit perfectly inside the Flush-n-Sparkle cartridge (if you remove the black foam used as a spacer). I just tested my first refilled cartridge with these tablets in the toilet. I can report that the bowl water has more free chlorine than I was getting by refilling with broken fragments of a 3" Clorox toilet cleaning tablet. To refill the cartridge, all I do is cut a slit along the seams on opposite sides of the bottom of the Flush-n-Sparkle cartridge cylinder, pry off the end-cap, discard the black foam, and put four of these tablets inside the cartridge. Replace the end cap and the cartridge is ready to go back into the dispenser. All that is left to discover is how long these tablets last in this application. Very happy so far. Note: The 1.5 lb (0.7 kg) bottle that I received contained 44 tablets. Each tablet weighs just a little over 1/2 oz (0.56 oz) or 15.9 grams. So I expect to get at least 11 refills of the cartridges for this price. Much cheaper and maybe less plastic going to the landfill. ++++++++++ UPDATE: I've used these tabs for a week or so and can say they sure do put a lot more chlorine into the bowl than the refill cartridges from Fluidmaster, at least double. That means there is a noticeable bleach smell near the toilet, which may be a problem for some sensitive users. My wife has not complained yet so I am going to keep using them. Some folks may prefer the cleaner-smelling effect. The tabs are not dissolving too quickly either. Caution: I would be very concerned if we had pets drinking out of the toilets. Also I would not drop these tabs in the top tank without the cleaning system either, as I expect the high chlorine level would aggressively attack the rubber seals. ++++Update May 3, 2024++++ I originally bought a dozen or so Flush-n-Sparkle cartridges. I just refilled about 8 empty cartridges that we have accumulated over the past several months. Each empty cartridge holds 3 or 4 of these HTH 1" tablets. We have 3 toilets and 3 family members, and we are all at home most of the time. I try to check the toilets around the first of each month and replace any cartridges that are mostly empty. (I use a sharpie to write the replacement date on the top of the cartridge to track it. This date is easy to erase later with an alcohol pad. I would say that in our use case, these refilled cartridges are lasting 4 - 5 weeks in each toilet. If there are a few remaining pieces of undissolved tablet in a used cartridge, you can just insert 3 new tablets and crush down the shards. If completely empty, then 4 tablets will fit. I have 7 of the original 44 tablets left, so it is time to reorder more HTH tablets. This is a much more affordable solution for us. ****Update: 01/2026***** I also bought the 5 lb. jug and those tablets were just a tiny bit thicker. This caused a refill reduction from four tablets to three, because four tablets from the 5 lb. container did not fit in the cartridge. Not a big deal, but now I get about a 3 weeks between refills instead of 4 weeks. I change all three of my tanks at the same time, so sometimes not all of the tablets have completely dissolved: there is a remainder. So I use those undissolved pieces next time when I refill cartridges with the three tablets.

I'm very happy with this product! It arrived as described, was well packaged, and the quality is great for the price. It's easy to use, works as expected, and I would definitely recommend it to others. Overall, a great purchase!

These chlorine tablets are easy to use and help keep the pool water clean and clear They dissolve at a steady rate and do a great job maintaining proper chlorine levels The container is convenient to store and lasts a long time Great value and a reliable choice for regular pool care

I have a very large blow up pool, but it's small by most pool standards. I got a floatie for chlorine so it didn't melt the plastic. These tablets are perfect. They fit perfectly inside my floating dispenser which is fun. The chemicals seem to be pretty effective, as there are no mosquitos or algae. I did have to tamper with them, breaking them up and using different size pieces for the space. Initially it was too much and burned the eyes so I used less and it didn't kill all the bacteria. Split the difference and it's perfect. They're easy to break up, the concentration is substantial and a little goes a long way. The quantity is perfect for my small pool. I use about a quarter tablet every week and we're able to play and have fun in the pool all summer. I did some research first and this is a great value for the cost. Really gets the job done!

Overall, this is a very good chlorine for an inflatable hot tub. I use one tablet every 6-10 days, so they last pretty well and are effective. The only down side is that they seem to leave some small black grit (?) in my hot tub. A day or two after each tablet, I find black specks of ? that I clean out of the hot tub. That said, I would highly recommend this product.

Great Chlorine tabs. They really do assist in keeping the water clear.

This kept our pool clean all summer its all we needed for a small above ground pool

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Works weell

Good product