Review on 🐠 LAWNFUL Aquarium Air Pump: Ultra Quiet 4 Outlet Fish Tank Pump with Adjustable Air Valve - Ideal for Hydroponics, Ponds, and Aquariums by Crystal Mack

I bought this because I've moved and put my fish in a new larger tank; I used a canister filter that doesn't agitate the top of the water like a side hanging filter does. My fish struggled to breathe and spent all of their time at the surface of the water. I threw a few stones here and the thyme immediately started behaving normally (swimming on the bottom, eating, resting on the sand). I highly recommend this if your aquarium needs an oxygen boost.