Mini CO2 diffuser for nano freshwater aquariums.Key Features:• Optimal enrichment with main plant nutrient carbon dioxide: CO2 diffuser for small freshwater aquariums from 20 up to 400 litres.• Suitable for all common CO2 systems: connect to CO2 hose (4/6mm), mount diffuser in the aquarium with suction holder.• Even release and effective distribution: special ceramic for very small CO2 bubbles, built-in ceramic diaphragm.• High-quality glass design.