Suppliment your existing filtration system and capture the benefits of Miracle Mud. Refugium with Miricle Mud provides continuous releasing of nutrients/minerals and trace elements into your aquarium. Creates an ideal “Nursery” area for fish fries. Refugium establishes controlled growing area for micro algae which can reduce nuisance “hair” algae grown in the main aquarium. Reefugium 200 Specifications: - For aquariums up to 300 gallon tanks - Dimmentions: 36"L x 8"W x 8"H Reefugium 200 Includes: - Acrylic Reefugium Tank Only