Sodium Thiosulfate Pentahydrate 5 lbs by Cesco Solutions - for Pools, Aquarium, Pond, Hot Tubs

It worked perfectly.

Great water dechlorinator for my fish tanks, my tap water isn’t badly contaminated with anything (I test it) and only the chlorine is left so I fill my tanks with near perfect temperature needed for my fish and throw in small amounts of this and within minutes is ready for fish. Great and way cheaper than premade store variety

I needed to reduce the amount of free bromine in my swim spa (1200 gallon hot tub). Just a bit of this product was able to reduce the free bromine the the correct levels in just one application. Very easy to use, READ ALL PRECAUTIONS AND USE AS DIRECTED and you will do just fine!

After filling up I was able to move my cichlids to a fresh tank within a few hours after adding the substance

This product worked as described. I had 5x Chlorine due to a small algae breakout. I used the whole bag and my 30,000 gallon pool was back to zero. I did notice a sulfur smell for a few days afterwards though. Price was half or more off the pool store price.

Good price on this chemical to dechlorinate water I add to my pond.

I use this as a declorinator for my aquariums. Great buy easy to use and mix. Will never go back to anything else

In order to destroy a mustard algae bloom in my pool, I did a chlorine SLAM. This raises your chlorine level very high based on your cya levels. Mine chlorine was 30 ppm. You have to keep this level up until their is no sign of combined chlorine in your pool. After the algae is gone, you can let the sun destroy the excess chlorine. This takes along time, especially if it’s raining a lot. The other ways to lower the chlorine is a partial pool drain if thru chemical means. This product was the cheapest chemical way to go. It comes in a crystal like form and you spread it throughout the pool. It works as stated without any side effects. It states that it could lower your PH, but I did not see those affects.