Carib Sea ACS00526 Mineral Mud Filter Media for Aquarium， 1-Gallon</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Mineral Mud particles are in a size range compatible with soft， burrowing in faunal， macro animal assemblages</li><li>Ideal for mud refugees， sea grasses， macro-algae's and mangroves</li><li>Mineral Mud contains live marine bacteria to complete the tropical ecosystem</li><li>Never needs to be replaced</li><li>Made in the USA</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/51MuBgl5fmL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31vQZRobECL.jpg' noproxy></br>