EasyCare 30064 PoolTec Algaecide， Clarifier and Chlorine Salt Cell Booster， 64 oz. Bottle<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Cuts chlorine use by 25-percent to 65-percent and more</li><li>Superior algae control with easier overall pool maintenance</li><li>One bottle will last the average 20，000 gallon pool</li><li>Substantially improves water quality and swimmers comfort</li><li>4 oz. weekly (per 10，000 gals.) maintains water clean， clear， and algae-free.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51YDPOI7EGL.jpg" noproxy>