The Original Sinking and Floating Chlorine Dispenser for Pool, Uses Less Chlorine than a Floater, It Sinks - Cleans Water - Floats Back Up, Replaces Pool Chlorine Floater, Light Blue

Follow the directions and contraindications and it works perfectly. Uses much less chlorine than top floaters and keeps it where it needs to be and out of your lungs. My pool guy was skeptical but the ease of use and perfect water tests impressed him. I could never go back to the floating dispensers now.The pool overall is much nicer to use with the chlorine not concentrated in the top level, too.My in-ground pool has pale plaster and neither staining or discoloration has ever been a problem from the Sunken Treasure and this product doesn’t bother the pool cleaning robot.

Works great just as described

Seems to be a rationally designed accessory. Good quality. BUMMED I didn't get a usa sticker though. That was the reason I ordered it!!!

Updated Review 8/10/22This is a 6 year usage review of this chlorine dispenser. I purchased my 1st one May 24, 2016 for $27.63. I just purchased this new one August 8, 2022 for $34.88. I scoffed at the price then and I really do now. Haha!! The price is crazy high BUT I can't dispute that it works. It's kept my 12,000 gallon pool in South Florida perfect with 1 tablet only and minimal liquid chlorine use during heavy loads of people. My house is in full sun, from sun up to around 6pm - 8pm depending on time of year. I also agree with another reviewer that you should around drill a 1/8 hole on each side so that gas escapes to prevent premature floating when there's a tablet still inside. I'm honestly not sure why this dispenser doesn't work for some people that have reviewed it but I highly recommend trying it. Hopefully I get another 6 years out of my new one!!Original review:This is one well thought out and great product. My chemical usage has dropped drastically. I have a 12000 gallon pool, so I did as recommended and started it initially with 2 tablets. I dropped it in the deep end and walked away. I live in sunny south Florida, and its been in the low 90's for the past 2 weeks. My pool is in direct sunlight from sunrise until about 6:30pm. After about a week and a half, the Sink-Float did exactly as advertised and floated to the top. I had about 1/2 tablet left on the bottom and 1/4 of a tablet left sitting on that one. My biweekly water tests have been checking out perfectly, and I haven't seen one lick of yellow or green in my pool. It's crystal clear. I put a new tablet in and threw it back in the deep end. I love not having to see a chlorinator floating.My chlorine levels still test in the 3-4 range. I take my water samples from about 3 feet down in the pool.Also, I rad a review that said that pool vacs caused the Sink-Float to open up and dump the tablets directly on the pool bottom. I have a Baracuda G3 that bumps the thing all over the place and so far, no problems. If it possibly becomes an issue in the future, I'll probably use a light weight zip tie to keep it together. I don't think that its going to be an issue though.Overall, great product, and AMERICAN made!!!

After reading all the positive reviews we were very excited to get the Sunken Treasure. We really liked the idea of not having a floating chlorine dispenser that always seemed to follow us around the pool, like our old one did. And, the idea of using less chlorine sounded great too.BUT unfortunately, this product doesn't seem to be working. We've had it a few weeks now and so far it has not performed the way it was advertised. We have a large 16x36 inground gunite pool with a 8-9' deep end. We dropped it into the deep end after filling it with two 3" chorine tablets, as instructed.(It specifically says to only put in 2 tablets regardless of the size of your pool.) It sunk to the bottom as it said it would, but after almost a week it had not floated back up to the top and when my husband checked the chlorine level of the pool water, it was almost non existent.He pulled out the Sunken Treasure and it still had about a 1/2 tablet in it...just enough to not let it rise but certainly not enough to chlorinate our pool. So, he filled it again, this time with 3 tablets and after 4 days we found it floating. We thought "oh good, it's working". But when we opened it there was still at least 2 tablets left in it.We couldn't figure out why it floated to the top this time when it didn't float to the top before when it had far less chlorine tabs in it. He added another tab to it and dropped it back into the pool again. It's still at the bottom and we're waiting to see what happens next.We've had to add additional chlorine tablets to the skimmer and also added liquid chlorine because so far this vessel doesn't seem to hold enough tablets to keep our pool at the required level. We use to have the other kind of chlorine tablet dispenser...the kind that floated on top and held about 4-5 tablets. That one seemed to work much better. We rarely had to add additional tablets to the skimmer...only when it was very hot and the chlorine dissipated more rapidly.We're really disappointed the Sunken Treasure isn't working better because we like the idea of not having the chlorine floating around where we swim but so far it's not adequately chlorinating out pool.Maybe it's OK for a smaller pool, really don't know. We'll give it a couple more trys but at over $30 it's too expensive to keep if it doesn't work as advertised.Update: 7/29/13 We never did send the Sunken Treasure back. Just wound up keeping it as an additional chlorinator. We still like the idea of it being at the bottom of the pool. We just adjust our chlorine level by adding additional tablets to the skimmer. The ST still does not work properly. It constantly floats to the top when it shouldn't. Most of the time there are 1 or 2 full size tablets still in it and it's floating. It has also discolored our light blue plaster. We found it had moved off the drain and was sitting on the bottom of the pool. When we moved it there was a yellowish stain that we can't remove. I would not recommend anyone buying this product unless these issues are resovled and the product is improved.

Works great, easy to know when to refill chlorine when it floats to the surface. This my second one. My first one I purchased 8 years ago and has been in my pool ever since. Unfortunately, being in the pool for so long, one of the tabs broke off. It worked so well I bought a new one. I recommend the light blue over the dark blue. The dark blue lost its color and faded after 6 months, the light blue stayed the same color for all 8 years.