![The first external filter with the technology to extend intervals between cleaning | EHEIM GmbH & Co. KG. Leading aquarium manufacturer. The first external filter with the technology to extend intervals between cleaning | EHEIM GmbH & Co. KG. Leading aquarium manufacturer.](https://eheim.com/media/image/3b/0b/57/2271-2275_prof_4-_D-1.jpg)
The first external filter with the technology to extend intervals between cleaning | EHEIM GmbH & Co. KG. Leading aquarium manufacturer.
![EHEIM classic filter bucket EM250 / 350/600 at the bottom of the tank outside the filer quartz models cotton ball paragraph|bucket lid|bucketbucket pin - AliExpress EHEIM classic filter bucket EM250 / 350/600 at the bottom of the tank outside the filer quartz models cotton ball paragraph|bucket lid|bucketbucket pin - AliExpress](https://ae01.alicdn.com/kf/HTB1S2O2IXXXXXXoXpXXq6xXFXXXw/EHEIM-classic-filter-bucket-EM250-350-600-at-the-bottom-of-the-tank-outside-the-filer.jpg_Q90.jpg_.webp)
EHEIM classic filter bucket EM250 / 350/600 at the bottom of the tank outside the filer quartz models cotton ball paragraph|bucket lid|bucketbucket pin - AliExpress
![The first external filter with the technology to extend intervals between cleaning | EHEIM GmbH & Co. KG. Leading aquarium manufacturer. The first external filter with the technology to extend intervals between cleaning | EHEIM GmbH & Co. KG. Leading aquarium manufacturer.](https://eheim.com/media/image/93/82/07/160707090759.jpg)