The Juwel Aquarium Fine Blue Filter Sponges house the most important bio - cultures, which are responsible to effectively clean the water.

It is recommended to clean or replace the Juwel Aquarium Fine Blue Filter Sponges at least every 3 - 6 months to maintain the right biological balance in your aquarium. Please observe the maintenance guidelines in your instruction manual for further details.

Filter Sponges Bioflow 3.0 / Compact fine
Measurements: 9.5 x 9.5 x 4.8 cm