Brightwell Aquatics ABAKALK100 Kalk Plus 2 Dry Salt Water Conditioners for Aquarium， 3.5-Ounce</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>The advanced supplement provides calcium， and magnesium</li><li>Improves water clarity and eliminates cloudy water quickly</li><li>Specially formulated for marine aquaria， Not recommended for freshwater aquaria</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/518MFocEu7L.jpg' noproxy></br>