I will put a Moina culture in this jar. I paid $11 before shipping for a Moina culture from Carolina Biological Supply. Do you think they give you this big a culture? No indeed! I will also include a smaller jar of green water and 1 oz of spirulina powder. One recommended feeding recipe is a 2 to 1 mix of active dry or instant yeast to spirulina powder. Or if you can keep the green water going, you don’t have to buy food!