The Tetra air pumps are very quiet and extremely powerful pumps that operate using sound-dampening chambers. Additionally, they feature an innovative design with thick housing walls and special rubber feet that absorb vibrations. The pumps are high-quality and reliable, providing a high and consistent air flow thanks to an efficient and durable membrane. These pumps can be adjusted using a flow valve included in the packaging. They are easy to use and suitable for aquariums ranging from 50 to 100 liters.