Reef Builder， 1.2 kg / 2.6 lbs</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Raises carbonate alkalinity in the reef aquarium without immediate impact on pH</li><li>With long term use Reef Builder will stabilize pH</li><li>Carbonates and calcium are essential to all coral growth， if either becomes deficient， coral growth will cease， followed by a rapid decline in health</li><li>Used as directed， Reef Builder will not deplete calcium， magnesium， or strontium which usually tend to precipitate with increasing alkalinity</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/4106iasUYoL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31kTADI0zxL.jpg' noproxy></br>