Wanting to create your own grain spawn to go with your monotub? We've got you covered with this grain spawn kit designed specifically for your 25-35 liter monotub.  There's enough grain and gypsum in this kit to create up to 720 grams of grain spawn.  Included in the kit:

• 360 grams of our organic, non-GMO rye grain berries
• 18 grams of pelletized gypsum

Not sure if this is the correct amount of grain for your tub? Have no fear, check out the monotub calculator here.