Circulation Fan 40 is a small fan for air circulation and ventilation to be installed to System Paluda series. For the System Paluda series, because it can be installed to the hole (Ø40) on the side either from the outside (for suction) or the inside (for exhaust), the flow of air and humidity inside the aquarium tank can be appropriately adjusted according to ecology of plants growing in Paludarium. And by filling the aquarium tank with mist generated from Mistflow, an environment with flowing mist such as cloud forests can be recreated. It is drip proof to be able to use in a humid environment. And the airflow can be adjusted in 3 stages