Eheim Classic External Filter 350 2215 Tanks up to 350L Column Shaped Aquariums there is an extra layer

there is an extra layer of cells and fins around the outside of each piece that enable microscopic organisms such as Rotifers and Vorticella to thrive

10) Place the CO2 Diffuser in the aquarium

Enhances the biological filtration process

The result is clear

Adjustable temperature

Eheim Classic External Filter 350 2215 Tanks up to 350L Column Shaped Aquariums there is an extra layerEheim Classic External Filter 350 2215 With EHEIM classic you have everything that makes up a reliable high quality external filter. By choosing a classic you wont go wrong. Because you have chosen a reliable, millionfold tried and tested piece of equipment. All models perform to the highest quality standards. First class components and carefully matched features ensure perfect pump and filter performance. Additionally, you have the proverbial EHEIM