Worm Casting Tea - Compost Tea Brewing Kit 2 -D9 Aerator supplies 1000's of air bubble over the entire surface of container - Commercial Grade Air pump is powerful enough to supply air to 2 D9 Aerators - 10lbs of High Quality Worm Castings - Kit comes the with ingredients needed for 3 five gallon brews (3 acres of coverage) - All you need is a 5 gallon bucket and plants