This inexpensive 4 site bubbler system is designed to take rooted seedlings or cuttings and grow them to Vegetative maturity before transplanting them to your flowering room. Each bucket includes four net cups, a 5 gallon bucket that serves as a reservoir, air pump, air stone, and tubing. The net pots lay snug into the bucket’s lid and the air pump pumps the reservoir full of the highly oxygenated nutrient solution. Maintain or drain water using the attached water level indicator. System come with ViaStone grow rocks, nutrients sold separately.