The Q Air Pump series produces consistent air flow and is among the quietest models available thanks to an integrated pump well and noise-suppressing baffle chamber.
Review by L0ki on 13 Feb 2023review stating Wouldn't push air
I have a 20 gallon tank and replaced the tetra pump which did work fine & moved air freely even with a valve check in place but got nosey the Fluval isn't strong enough to move air even when I removed the valve check both pumps are for 10-50 gallons I will be returning the Fluval for a refund I would post pics showing my experience but can't?