Aqua Chem pH Up for Swimming Pools， 4-Pound<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Raises pH levels</li><li>Prevents eye irritation</li><li>Prevents corrosion of pool equipment and surfaces</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41RfoXEy2UL.jpg" noproxy>