Easily attaching to the side of most aquariums up to 1" thick, the Fluval Multi-Chamber Holding & Breeding Box provides up to 3 separate housing compartments for protecting fry, sick/weak fish or new fish that require acclimation. *Requires Air Pump (1L/per minute ) and Airline Tubing - sold separately Key Features : Multi-functional breeder box allows for 1, 2 or 3 separate housing compartments Ideal as a hatchery and incubator to help protect new born fry from being eaten (improves survival rate) Provides a safe haven for injured or weak fish 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) Utilizes same conditioned water as aquarium - no additional heater or filter required For use in fresh and saltwater aquariums Included : 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