Aquarium Cooling Fan 2 Fan Model (AQT-F02) - THIS MODEL IS DISCONTINUED BY MANUFACTURER - NO LONGER SOLD BY AQUATEK - NO MANUFACTURER WARRANTY NO ASSEMBLY REQUIRED (AC adapter included) EASY INSTALLATION (Clamp mounting bracket) Note: Clamp mounting bracket can fit over aquarium walls up to 1/2" thick Extend Longevity of your lighting system Recommended for tanks up to 20+ gallons Low power consumption