HTH 67009 Alkalinity Increaser， 5 lb<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Hth alkalinity increaser， 5 lbs.</li><li>The ideal alkalinity range is 60-120 parts per million</li><li>Raises alkalinity. Helps keep pH levels in range. Compatible with Salt Systems</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41UL-%2BcUw4L.jpg" noproxy>