The Exo Terra Monsoon Solo II is a programmable misting system suitable for all types of terrariums and greenhouses. It helps maintain optimal humidity by generating a fine mist at programmed intervals, the duration and frequency of which can be easily adjusted depending on the type of animal or plant housed. Frequent misting helps stimulate breeding behaviour, and is a necessity when housing live tropical plants such as Bromeliads, orchids, mosses, etc. Programmable misting unit for terrariums and greenhouses 0.4 gallon (1.5 liter) reservoir Easy to refill Easy to connect and install One spray nozzle produces a mist that has a fog-like effect in the terrarium