The millions of microbes that inhabit each milliliter of water are crucial players in the Earth’s carbon cycle and aquatic food webs. Despite their importance, little is known about the microbes in Lake Michigan, which experiences inputs from land, the invasive dreissenid mussels, and growth/abundance of tiny photosynthetic organisms. We’d love for you to help play a part in our work to understand how these affect the lake’s microbial populations and the overall Lake Michigan health and ecology.