We are now offering the newest method for pool and hot tub tile cleaning by pressure washing with a wet sandblaster. Can Pebble Tec be cleaned as well? Absolutely! Glass beads are the best when it comes to blasting Pebble Tec. Not only will glass bead blasting take a fraction of the amount of time that a pumice stone or brush will, it also does a better and more complete cleaning than other media. We do not need to empty the pool or hot tub! This process can be performed year round. We lower the water level about 6 inches, or just below the calcium line. This gives us enough room to be able to perform the cleaning.