4-stage filtration (2 x mechanical, chemical, biological) for superior water clarity and qualityCycleGuard preserves the biological balance of your aquarium through independent media replacement, which avoids disrupting the nitrogen cycle and is essential for maintaining clean and healthy waterAdjustable flow control for precise adjustment - Quick and easy maintenance – reconfigured media basket design offers a dedicated space for each cleaning stage, allowing for faster and simpler changesAll media includedFor use in freshwater and saltwater aquariums up to 20-50 US Gal / 76-190 L