Spa Essentials 32538000 Total Alkalinity Increaser Granules for Spas and Hot Tubs， 2-Pound<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Raises alkalinity level to protect spa water from sudden changes in pH</li><li>Helps prevent staining， corrosion and pH bounce</li><li>Properly balanced spa water is a must if you want to fully enjoy your spa</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41XzJEihXzL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41CRVYit5ZL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31Egp03TISL.jpg" noproxy>