The Active Aqua Root Spa 8 Bucket System is a Deep Water Culture system that comes with 8 buckets and an air pump that encourages tremendous growth for your large plants. The buckets can hold up to 5 gallons and your choice of growing media. Its water-tight seal guarantees no leaks. No need for expensive and tricky to use air stones. Pumping raw air into the nutrient solution is cost-effective and helps your plants to thrive. The pump sends air shooting through the multi-purpose air hose into the bottom of the bucket, where it then oxygenates your water to enhance root growth. Enjoy this easy-to-use, inexpensive, and forgiving system, the Active Aqua Root Spa.