Baqua Spa Total Alkalinity Increaser (1)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Raises Spa Total Alkalinity</li><li>2 1/2 oz per 500 gallons to raise alkalinity 20 ppm</li><li>Sodium Hydrogen Carbonate: 100%</li></ul></div><img src="http://ecx.images-amazon.com/images/I/412ZtOk-nML.jpg" noproxy>