Microworms are not actually worms, but are nematodes, species Panagrellus Redivivus. They are for feeding newborn fish (fry).
If you plan on breeding your own fish, you'll need some type of very small food. Living food is best. Microworms are perfect!
Microworms
Starter Culture
Our starter culture is 1.5oz of media swarming with microworms. They can be used right away, or you
might want to start your own new microworm cultures - you'll need your own recipe, or choose our microworm mega culture below.
Our mega culture the starter culture (1.5oz of media swarming with microworms) PLUS a large dry culture. You'll add water and microworms from the starter culture when you're ready for more.