Spa Essentials 32518000 pH Increaser Granules for Spas and Hot Tubs， 18-Ounce<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Raises pH and easy to use</li><li>Protects corrosion of equipment due to low pH</li><li>Balances water for bather comfort</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41OTgxaVIyL.jpg" noproxy>