Jack's Magic JMPURPLE032 The Purple Stuff, 32 Ounce

Works great. Use on stains in pool and on the steps. We use all the time.

We add this to our 15k gallon inground saltwater pool twice per year. It is part of our regular regimen that keeps metals and staining at bay. Wish it was a bit cheaper, as all it is is phosphoric acid.

My cloudy pool water was driving me crazy. I had tried multiple products that Leslie's pool supply recommended, which did nothing noticeable. Finally, I remembered the previous owner of my house mentioned that he used this Purple stuff. I have a 26K gallon salt water pool, and one bottle of this stuff made my water look so much better. After seeing the amazing results, I immediately purchased another bottle for maintenance.

This was a waste of money for me in my opinion. It did not help anything in my pool. I was trying to keep all metals in solution so they wouldn't stain anything while I was removing them. However, after I spent a lot of time and effort to remove the stains from the plaster, this product did not do what I was told it would. It might be good for something else. But not that. Within 2 weeks my stains were back (in different places) so I know my acid stain remover worked but Jack's Magic didn't keep the metals in solution long enough for me to get rid of all of them. Oh well, lesson learned.

I have used this stuff several times when my saltwater pool turns green and cloudy. It turned my water crystal clear after an hour. Would recommend it to anyone with a saltwater pool. Have no clue if it will work on a chlorine pool.

Pool looks brand new. Dissolved all stains immediately. Amazing!!!

Works as intended, but you have to keep adding more each week or couple week to keep sequester levels in range. It becomes very expensive over the course of a year, so there has to be a better way.

Just tried not sure