Emily's Garden plants, thrive in its own small one-gallon container which stands in a reservoir filled with water. Fresh air is bubbled through the solution to provide the high oxygen level needed for robust growth. Emilys garden comes complete and ready-to-run; just add seeds, light and water! Units include grow rocks, enough liquid all-purpose nutrient for a first crop, six grow containers and complete instructions for easy operation. Includes 2 gallon resevoir Air Pump Seed starter cubes Nutrients Ph tester kit