Applied Biochemists Copper Sulfate Crystals， 5 lbs.<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Copper Sulfate Crystals</li><li>Commonly used in ponds as an algaecide</li><li>Contains 99.0% copper sulfate pentahydrate.</li><li>Also for use as root destroyer in sewers.</li><li>Size: 5 Pound</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ERhiXMliL.jpg" noproxy>