Review on VIVOSUN 332 GPH Air Pump - High-Performance 14W 4 Outlet for Aquarium and Hydroponic Systems - Efficient 21L/min Flow Rate by Lori Dahl

Five gallon bucket for hydroponics. Hands down the best pump I've ever used! I had a bucket 3/4 full and had a 4 inch air stone in it and the water hit the top of the rim. Rschunimagu. Insanity! Very well done and I will definitely buy again if I ever expand. He's good at pushing 4 4 inch rocks and two is amazing. I would imagine he would push 4 2 inch air bricks like a champ. Great price for this pump as it is very quiet. Also, I love that you can turn the air as high or low as you like. For a four bucket DWC bucket system, this is all you need. If I had an aquarium it would be perfect for a large or small aquarium because of the controls. I'm sure they are better than air pumps on the market but I guarantee you they aren't under $50 like these. To be honest I don't think you need more horsepower unless you have a thousand gallons or something. happy with my purchase. Many Thanks