Brightwell Aquatics Magnesion - Liquid Magnesium Supplement for Reef Aquaria 500ml / 17oz</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Highly-concentrated ionic magnesium solution.</li><li>Provides magnesium， which helps regulate the balance between calcium and carbonates in aquarium wate</li><li>Stronger than most competing products.</li><li>Contains no unwanted organic material such as EDTA， gluconate， or polygluconate.</li><li>Formulated by a marine scientist.</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/41jsEO9HcNL.jpg' noproxy></br>