Jack's Magic Power Blue Water Line and Tile Cleaner Size: 1 Gallon

This stuff is truly amazing. I tell you! We opened our pool and found a nice line of calcium and pollen which had hardened. Before adding water, we decided to try this stuff and scrub the tiles. I didn’t even have to let it soak. I would spray five or six waterline tiles and then starting with the first one start scrubbing it and with very minimal effort, everything came off.I highly recommend this for any pool. Our pool is a salt pool and it did not change any of the chemical levels as you only need a little bit when you spray. Super easy to use! And worth every cent.

Have used this for years, will not get rid of water line stain but still cleans well.

Doesn't work. Should have returned it.

It really works

This deserves a much higher rating. I had light beige tiles at the water line all around the pool. After a year of pine tree sap, dirt, and sunscreen, they were a dark brown and seemingly impossible to clean. I used this product (added to a squirt bottle) and a bathroom tile scouring pad with handle (some kind of nylon mesh pad I think) and the entire pool was done in 30 minutes and the tiles look new. I squirted the scouring pad instead of the tiles and it worked best. It took only a few seconds per 4" tile. I didn't lower the water any. It seemed to work better with the water there. It only took a fraction of the bottle. My wife has an extremely high bar for what's clean and she was almost giddy.

Great value and works well.

This is good stuff. It does exactly what nothing I have ever used does. It really is spray on, go back and wipe off with a green scrubby. Repeat around the pool. The sprayers that come with the small bottles are not the best-- no big deal because the product is excellent.

It didn't work after trying it three times.