Your cart is empty.
Your cart is empty.The HTH Super Green to Blue Advanced Shock is a 2-part system. Pack I shocks your pool with a boost of chlorine, helping you fend off bacteria. Pack II is a powerful flocculant that drops particles to the bottom of the pool for easy vacuuming. Both packs work together to create beautiful, crystal-clear pool water within 24 hours. How To Use: Simply follow the on-pack instructions for both Pack I and Pack II. Pack I is the Cal Hypo Shock treatment and Pack II is a flocculant that drops dead particles to the bottom of the pool for easy vacuuming. About HTH Pool Care: HTH was developed with the pool owner in mind. We know that maintaining your pool water can be a lot of work. That’s why we're here every step of the way, helping you clear the uncertainty from pool care. With economical, easy-to-use solutions, HTH is designed to work hard so you're prepared to tackle whatever life throws in your pool. From balancing your water to treating green water, we offer a full line of products to keep your pool water healthy and your swimmers happy.
Laura y. Mata
Reviewed in the United States on March 4, 2025
Did not work at all. I have used back to blue forever, works the first time has never failed clear pool the next day. I thought I would give this one a try and It did not work at all. Very disappointed and a waste of my money.
Kfa
Reviewed in the United States on March 12, 2025
Works as intended
Court L
Reviewed in the United States on February 22, 2025
This product is absolutely amazing! If you follow all the directions on the package it will clear extremely green water over night. I have used this several times now over the last year and it works every single time. I highly recommend this product to to anyone who has issues with green water.
Andrea
Reviewed in the United States on June 22, 2024
I opened up my pool this year and it was full blown swamp. Mosquito larvae, full of algae etc just bad bad bad. I worked diligently with my pool guy to try to fix the problem without draining- and after hundreds of dollars worth of chemicals nothing worked. I joined a fb group where everyone raved about this product so I said what the heck let me try it. Pool was light green but so incredibly cloudy for weeks on end. So anyway I put the “step 1” product in around my pool and disbursed it as it says so on the directions. Then I added “step 2” which was terrifying because it made the pool dark green but I just ran filter on circulate for an hour and then I shut it off. I woke up this morning to a crystal clear pool. The entire base layer was layered with debris/dead algae so I bypassed my filter and used my vacuum via the siphon method and very slowly vacuumed it all up. By 11am my kids were in the pool having the time of their lives. GREAT PRODUCT!!!!!!!!
ShinedownAddict
Reviewed in the United States on December 8, 2024
My pool pump had died and my water turned green before I could get it repaired. This stuff works!! Pump died twice, bought two of these, one each time. Definitely works wonders. Dead algae lands on the bottom, allowing you to siphon it right out - DO NOT use your filter, just siphon it out to the ground.
Pffft
Reviewed in the United States on November 15, 2024
After recent hurricane, our pool was filled with a ton of debris. Without power too, the filter pump was off which made the build up of algae and everything worse. Usually we keep the salt water inground pool water well balanced and clear. Even after getting as much of the debris out and scrubbing after about 3 weeks, the water remained dark green. We have a cartridge filter so instead of following the instructions exactly on the box, after adding the ingredients per pool size, we manually used the pool brush to mix around for an hour. In 24hrs we were able to see some to the bottom. In 48hrs we saw the clumped dead algae more at the bottom and less green on the pool walls. The clumps were hard to vacuum out though as it would disintegrate easily. Ended up turning filter on and then having to wash out all the mess caught in the filters for second time since the hurricane. After that, pool was back to clean and clear while balancing out the regular items. If you have a cartridge filter and use this then be ready to either wash out the clumps or having to replace them. We were able to wash them out but the product is not recommended for cartridge filters. Also will require extra time if unable to change water flow.
ML
Reviewed in the United States on October 10, 2024
Only suggestion is to add instructions on how to prorate for different size pools.
Mark P.
Reviewed in the United States on September 28, 2023
I have been fighting algae in my pool for a month! It started small and just kept growing and growing. I will always use this no matter if it is a tiny amount of algae or a massive bloom like what I ended up with. Pictures are in order.. First pic is when I was adding in Step 1, I removed my filter cartridge from my pump and just used that to help circulate. Left step 1 in for an hour before I added step 2. Ran the pump for a bit, then turned it off (about 6pm is when I started) by morning everything was on the bottom! I vacuumed 24 hours later (becaese that is when I had free time). I kicked up some algae during vacuuming so I was worried I would have to repeat the process again, but I let the pump run (with no cartridge) overnight and the next morning everything I had kicked up was settled back down to the bottom so I could just vacuum one last time!!!My pool holds about 9K gallons, it was a little low when I started, but I only lost about 6 inches of water in the vacuum process (vacuum to waste!!). I also only used half the contents of the box. So for roughly $14 my pool looks beautiful again!! So simple!!!
Recommended Products
$25.99
$ 13 .99 $13.99