Easily attaches to the side of most aquariums up to 1" thick, the Marina Hang-On Breeding Box provides isolated housing for protecting fry, sick/weak fish or new fish that require acclimation. Key Features : Multi-functional breeder box 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 6.5" L x 5" W x 4.75" H (16.5 x 12.5 x 12 cm) and holds 0.3 US Gal (1.1 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 Requires Air Pump (1L/per minute - A101) and Airline Tubing - sold separately 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 V-shape separator Leveling adjuster Air valve Airline tube 12" (30 cm) Discharge cap Intake extension O-Ring Strainer 2 x Slit plates for discharging water (1 thick frame - 3 bars, 1 thin frame - 5 bars) Fluval Size (L x W x H) BFA Item # Hang-On Breeder Box Medium 6.5 x 5.0 x 4.75 in HA10942 015561157667 015561152273