We've been receiving lots of questions regarding the Zebra and Quagga mussel control product named Zeaquanox. Following is a good article which includes clarification from the developer of the product, Dan Molloy. Pay special attention to what Molloy has to say about the use of the product. Most important to understand is that this product may not be used in "open water" applicaitons. The EPA prohibits this. Simply stated, it can't be used to control mussels in a lake, stream, or pond.