Reef Kalkwasser， 2 kg / 4.4 lbs</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Maintains calcium in reef aquarium</li><li>Pure calcium hydroxide with unsurpassed purity and solubility characteristics</li><li>Used to prepare limewater solutions that will maintain calcium concentrations at natural seawater levels</li><li>Kalkwasser solutions maintain calcium levels directly and alkalinity indirectly</li><li>250 grams makes 83 US gallons</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/41RGJsQ35jL.jpg' noproxy></br>