Marineland Penguin Cartridge Media Refill (fits 200/350)

The Marineland Penguin Refillable Filter Media Cartridge is a great alternative to standard media bags. This refillable cartridge frame has a patented ribbed design keeps the media of choice evenly distributed for maximum water-to-media contact. The snap open and lock tight design also ensure no media spillage for crystal clear and clean water at all times. Key Benefits Refillable cartridge frame. Excellent alternative to standard media bags. Patented ribbed design keeps the media of choice evenly distributed. Provides maximum water-to-media contact. The snap open and lock tight design also ensure no media spillage for crystal clear and clean water at all times for a healthy environment for life to thrive in.