HASA 76121 Super Stain Out, Quart

This stuff always gets the job done with stubborn stains, sometimes it takes a couple weeks to completely work its magic so be patient. Try to scrub the the stained areas every day a little until the stains are completely gone.

Not Great and my PH shot up. Had better luck with vitamin C.

Works fairly well. Still have some tough organic stains, but took care of a lot of other stains on my white plaster pool.

When we had our in ground pool put in 15 years ago we had no idea how bad well water can discolor white plaster with all of the minerals it contains. To compound the problem I thought by having white tile put in it would help keep the mineral deposit stain at the water level line not so noticeable between professional tile cleanings. Boy was I wrong! I thought it was time to re-tile, re-plaster but after the original builder of our pool came out to check out the problem he recommended a tile cleaning company he personally uses to clean his own pool and than another company to do a acid wash. I can not find enough praise to express the wonderful job the tile cleaning company did! Not only did he bring our tile AND white grout back to nearly new but he nearly cleaned up every trace of the powder like product he uses to blast the crude off and he even vacuumed the pool bottom twice! When my pool tech came out to clean the filters a couple of days later he couldn't find much of the cleaning product in the filters or tank! If you live in northern Calif. I HIGHLY recommend Frank Baysinger of Bays Affordable Pool Tile Cleaning. He's the gentleman who told me about Super Stain Out a HASA product. I ordered his recommended amount from Amazon, followed the instructions on the bottle and at first didn't notice anything, but by the second day WOW! And third and fourth day even better! I swear our pool looks almost good as it did when it was new! I ordered six more bottles to keep on hand because the instructions indicate for preventative maintenance to add 4 ounces per 10,000 once a week. I wish I had known about this product when we first had our pool installed. Well water can be brutal with all the mineral deposits it contains. I can't help but think if I had been using this product from the start I might not have had to deal with some of the damage it did to our pool. If you have a white plaster pool, do yourself a favor and try HASA super stain-out or at least ask your trusted pool tech. about it. Thanks again to Frank Baysinger of Bays Affordable Pool Tile Cleaning for the fantastic job he did on our pool tile and recommending super stain-out!The Brown's

I put one container into my 16K pool and it did not work.

Our in-ground pool was left unattended for months while we were out of state. Upon return the walls were brownish and the pool brush wasn't effective. I bought the HASA Super Stain Out and walked around the perimeter of the pool pouring it along the wall until the bottle was emptied. I allowed it a day for the pool pump to circulate the product, I then brushed the walls and I'm so pleased to say that the HASA Stain Out did an excellent job of removing the brown stain buildup. I will buy and use it again.

I've used this before but it had been a while and my pool had all sorts of stains from the water holes, on the bottom and side. Thought I'd see if this would make a dent in them. I used the whole bottle and within 2 days the pool was as clean as new. That's why I say AMAZING. I didn't expect such quick and complete results. I am now planning on using a little each week for maintenance.

TOOK OUT VERY LITTLE OF THE STAINS IN MY POOL.