Review on PONDFORSE Quiet Air Pump - 475GPH 30L/MIN, 20W with Adjustable Airflow & 4 Outlets for Aquariums, Fish Tanks, and Hydroponic Systems by Anna Hall

I have tried many latest generation Whisper AP300 pumps to ensure good root oxygenation in hydroponic DWC. Always the same problem: not enough power to propel 2 larger stones or ceramic stones. I just received my PONDFORSE 475GPH 30L/min 20W Silent Air Pump and WOW. This device is like four AP300 for less. So I had to tap "Exit" to see if it was enabled. If I could give more stars I would. So if you are looking for a powerful priming pump, you will love this one. Check the dimensions, it's a certain size but in a soft rubber case and rubber feet. Update: 7/8/21 Just bought a third one. I still love this pump.