Yinder 4 Pcs Pools Tile Pumice Stone for Cleaning Remover for Pool Tile 3.94 x 2.76 x 1.57 Inch Cleaning Pumice Tiles from Swimming Pool Spa Tile (Gray)

A product that does exactly what it says. Delivery was prompt and just as advertised. I can't emphasize enough how great it worked. Alittle elbow grease and my pool tile was like new. Don't hesitate buy now!!!

An effective pumice stone to remove the limestone ring around pool. Better than others we have used.

The pictures on Amazon depict a much larger than is actual size. Amazon shows this as a square block but the reality is it's about half the width of the pictures. The measurements of the product are actually correct but the pictures are very misleading.

Great product!! I recommend!!!

worked really well. i got rid of that white build up on the pool tiles above the water line.

The product dissolves to fast and you have to use a lot of them in order to complete the job.

I used one block of the pumice for less than 2 minutes (as shown in the picture) and it was disappearing before my eyes. not removing any rust or calcium build-up from my pool. 4 blocks for $20 would last me less than 30-45 minutes and leave my pool in the same condition as when I started. it would be faster and easier to just stand outside and set fire to a 20 dollar bill.

I used these in hopes of clean-up the water line around my inground pool and, it is hard to say if it wood work better if the pumice did not wear down so quickly!