Evolution Aqua AIRPUMP70 Diaphragm Pump. Great pump with 4 channels to run air stones in aquarium. 6 foot tank and just two pushed out loads of aeration had to turn the vales right down.The item "Evolution Aqua Diaphragm air Pump" is in sale since Friday, September 3, 2021. This item is in the category "Pet Supplies\Fish & Aquarium\Air Pumps". The seller is "shakeyspeare" and is located in Tamworth. This item can't be shipped, the buyer must pick up the item.