What You Will Need A Plastic Container With a Top (Margarine Containers are Great for This). Pure Oatmeal Dry Yeast Microworm starter culture If you’re serious about breeding fish, then at some point you should consider starting a culture of microworms. These tiny worms are the perfect food for many species of newborn fry and their wiggling motion in the water … [Read more...] about How to Culture Microworms