Fluval Multi Chamber Fish Breeding Box Easily attaches to the side of most aquariums up to 25mm thick, the Multi-Chamber Holding & Breeding Box provides up to 3 separate housing compartments for protecting fry, sick/weak fish or new fish that require acclimation. The Multi-functional breeder box allows for 1, 2 or 3 separate housing compartments and is Ideal as a hatchery and incubator to help protect new born fry from being eaten (improves survival rate) The Fluval Breeding Box provides a safe haven for injured or weak fish and helps acclimate new fish as water circulates throughout box from aquarium Hangs onto aquarium exterior for easily observing fish and convenient maintenance Space-saving design – measures 10.25″ L x 5.5″ W x 4.75″ H / 26 x 14 x 12 cm and holds 0.5 US Gal / 1.9 L of water For use with frameless aquariums with a glass thickness of 0.25-0.4″ / 5-10 mm and framed aquariums less than 1 ¾” / 47 mm Requires Air Pump (1 L/per minute – Item# A849) and Airline Tubing (Item# A1141) sold separately Utilizes same conditioned water as aquarium – no additional heater or filter required For use in fresh and saltwater aquariums Included in box Breeding box with cover Intake tube 3 x Partition plates 2 x Leveling adjusters Air valve Airline tube 12″ / 30 cm Discharge cap Intake extension O-Ring Strainer Cover clasps 2 x Slit plates for discharging water (1 thick frame – 3 bars, 1 thin frame – 5 bars) 2 x Attachments for frameless tanks