Got the specs from Groco
It's a pricy little doodad...list is $230. The pump moves 1.8 litres of air/minute, which is no small amount! It consists of the pump, which can be mounted on the top of the tank or on the side at the top...a length of hard PVC that reaches to the bottom of the tank...and a length of perforated tubing that lays the across the bottom of the tank (necessary to distribute air to the entire tank contents). For maximum benefit, it should be run continuously, especially in hot weather. No other holding tank treatment is required when installed and used as directed.