DrTim's Aquatics Eco-Balance Multi-Strained Probiotic Bacteria for Freshwater Aquarium， 64-Ounce</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Adds friendly， supportive bacteria to maintain a balanced environment</li><li>Promotes Optimal Water Quality</li><li>Blocks out unfriendly bacteria</li><li>100% natural</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/51NfxmTnQ0L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31IWaVZ%2BQeL.jpg' noproxy></br>