The Juwel blue filter sponge house the most important bio - cultures, which are responsible to effectively clean the aquarium water. You should clean or replace one sponge at a time every 3 - 6 months to maintain the right biological balance in your aquarium.

Juwel bioPlus fine -fine, blue Filter Sponge:

• suitable for Super and Compact S
• Bioflow 3.0, Compact, Copmact H and Compact Super
• Bioflow 6.0, Standard and Standard H
• Bioflow 8.0 and Jumbo