U shaped DIY of 4 in 1 Co2 diffuser for system check valve bubble counter planted Aquarium

This is a 4-in-1 high-performance CO2 diffuser for DIY CO2 system and compressed CO2 system, suitable for 300L aquarium. The check valve the gas system and pump equipment from anti-siphon damage. Color: transparent, material: plastic glass ceramic. The DIY CO2 diffuser is specially designed for low-cost planting aquariums. This carbon dioxide atomizer has built-in multi-functions, including check valve, bubble counter, ultra-micropore atomization and U-shaped air inlet. Also includes suction cups for installation.