Tetra Whisper Bio Foam Grid replacement kit. Replacement bio-foam grid for your Whisper power filter. Bio Foam provides an extreme amount of surface area for optimal biological filtration in the Tetra Whisper power filters.

• Replacement bio-foam grid for Whisper Power Filter 10
• Provides extreme surface area for optimal biological filtration
• Includes foam and a plastic frame

Tetra Bio Foam aids in the biological filtration of your whisper power filter. Each Whisper Bio Foam Kit includes foam and a plastic frame. For best results, replace the Bio Foam Grid according to the manufacturers recommended maintenance schedule.