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

This pump is quite large and cannot be hung from the back of the aquarium. You will need plenty of air hose as it will be stored under your tank and buy yourself some one way valves. It puts out a ton of air, way more than my 90 gallons need, but that's not a problem because the knob is adjustable so you get just the right amount. This pump can easily support multiple tanks of 90 gallons or even 125 or more. Comes with a 4 way splitter but you can split it even more as it releases A LOT of air. Great pump. If it breaks I will update this review.