Easily attaches to the side of most aquariums up to 2.5cm thick, the Fluval Hang-On Breeding Box provides isolated housing for protecting fry, sick/weak fish or new fish that require acclimation.Key Features :Multi-functional breeder boxIdeal 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 fishHelps acclimate new fish as water circulates throughout box from aquariumHangs onto aquarium exterior for easily observing fish and convenient maintenanceSpace-saving design - measures 16.5x12.5x12 cm and holds 1.1 L of waterFor use with frameless aquariums with a glass thickness of 5-10mm and framed aquariums less than 47mmRequires Air Pump (1 L/per minute) and Airline Tubing - sold separatelyUtilizes same conditioned water as aquarium - no additional heater or filter requiredFor use in fresh and saltwater aquariumsIncluded :Breeding box with coverIntake tubeV-shape separatorLeveling adjusterAir valveAirline tube 30cmDischarge capIntake extensionO-RingStrainer2 x Slit plates for discharging water(1 thick frame – 3 bars, 1 thin frame – 5 bars)