Dual Double Bio-Sponge Filter
$9.99
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- 5.5″W x 5.5″H for the Small (Left in photo)
- 6.5"W x 9.0"H for the Large (Right in photo)
- Comes in a colored retail box
- High quality bio-sponge
- Provides a wider space for nitrifying bacteria proliferation
- Driven by air pump, increases water circulation and oxygen
