Leisure Time A Spa Bright and Clear, 1-Pack

Excellent and easy to use. It does produce some foam but I scoop that out and have had no issues with yellow gunk as others have mentioned.

This stuff is amazing period end of story. If you want zero hassles trying keeping your spa crystal clear buy this stuff. Use as directed and you will never have an issue again.

Having iron in my hot tub water (on a well) I needed something that would not spike the chlorine level when used. This stuff works fantastic, crystal clear with no side effects of oxidizing the iron.

So i am the type of person who has zero faith in almost any product I buy nowadays... but this one certainly deserves the 5 stars and more. I have battled thisnjot tin for the last month i have owned it trying to figure out how to get the cloudiness out of it! I tried everything!! I spent so much money on chemicals etc all for nothing. I received this yesterday went home... put in an ounce and a quarter and turned on the pumps BAM All this brownish guck started to come to the top of the tub aling with a bunch of foamy bubbles. I spent the time to net and scoop out the gunge and wipe the sides which in total took about an hour as it kept appearing .. after a few houra i could see a major difference in the clarity.. but this morning the tub is crystal clear!!! Like paradise!!! I am super happy with this product and will probably just stock up on it cause it is a life saver. Trust me... this is what you need to solve alllll ur clarity issues!! Thanks so much!!!

My newish hot tub (3 weeks old) got cloudy overnight. I got the water balanced and reshocked it, even changed out the chlorine dispenser, but a few days later and it was still cloudy. I didn't think this product would help and worried I'd have to just dump the water and try again, wasting all the chemicals I just used trying to save it. It arrived from Amazon and I immediately added 4 tablespoons. Noticed the yellow scummy looking bubbles coming up quick so went to work skimming those off and wiping the edges over and over for about 20min. The water is back to being crystal clear! I am so thankful I don't have to drain and start over and we can use our newish hot tub again tonight now! AMAZING!