Jack's Magic JMPURPLE032 Salt Solution Purple Stuff 1-Quart

We began to develop some staining in our pool that looked a little like rust spots. We're on a well (no city water), so this could have been the culprit. We were given a bottle of Jack's Magic Spot Etching Stuff from our local pool rep, and the rust stains disappeared in about two weeks. The label also recommended using Jack's Magic Purple Stuff (for salt water pools), which we didn't have at the time. After about 6 months, the staining re-appeared. This time, I treated with Jack's Magic Etching Stuff and the Purple Stuff, and the stains were gone within several hours. Its been several months, and the stains have not come back. Couldn't be happier with this product.

We recently converted our above ground fiberglass pool to salt water. We also have a remington solar chlorine-free sun shock water purifier that floats in our 7500 gallon pool. Since we have well water, we pretty much automatically have hard water combined with the copper from the pump and the purifier. I noticed that pool was starting to get darker and darker but the water stayed clear. After researching what could cause such a discoloration in the fiberglass, I found this stuff. I wasn't expecting much, maybe just to slow down the progression but this stuff is amazing!! I poured it over the steps where it was the darkest and minutes later it was sparkling white. The pump ran for 2 hrs that night and every day over the past week. It has gone from being black with metal building to white with the very faintest of yellow staining. It has way exceeded my expectations! I didn't expect this simple of a solution that's for sure. I feel like using it once or twice a season will keep the pool walls spotless. I wish I'd taken before and after pics just to show how dramatic of a change it produced! Will 100% buy again!

I have used it from time to time. I guess more regular use is needed but this is an expensive product. After application the size and amount of stains were less. We use city water for make up and only have to try this stuff after using copper based alga control.

This product is meant for pools using a salt water chlorine generator system. It works very well for us.We use it when some mineral accumulation is visible; it clears the pool walls within a day or two. We use it 2 or 3 times a year.

Had some ugly stains in our fiberglass salt water pool. This stuff really works and all stains disappeared! Love this entire brand of pool supplies!

This stuff is amazing! No kidding! I see rust stains appearing in my 20K+ gallon salt free chlorine pool on the white steps. I turn of the skimmer pump so I can just focus the pour on the steps at first and then pour the purple stuff right on the steps. After letting it sit calmly for a bit, I turn the pump back on and let it circulate. The steps are bright white. It looks like one of those dental whitening commercials...LOL!

We are new to pool ownership and our brand new Florida located salt water pool developed a nasty brownish rim on the tiles at the waterline within 4 months. Research turned up Jack's Magic as a potential solution. We followed directions and within 3 days the stain had gone. We continue to maintain the prescribed quantity of "purple stuff" and have a crystal clear, clean pool ever since.

not sure if it's because of this stuff, but I've been putting about 8oz of this into my 25,000 gal pool for the last few years and it seems to keep the sand filters all working fine. only note that I've been getting some copper stains accumulating (probably from the heater I ran a few weeks in spring) which this does not seem to eliminate. Apparently I'll have to go to some other Jack's stuff to get rid of that.