With ultra-compact CO2 injector for connection to Nano corner filter/corner filter XL

- Over 30 days constant CO2  supply

- Produces over 300,000 CO2  bubbles

- Specifically for Nano aquaria of up to 15-20 Gal

- With fermentation control gel for evenly controlled CO2 production

-With bottle support. The CO2 bottle is applied to the aquarium (for CO2 production adapted to the aquarium temperature)

- With CO2 bubble counter to clean the CO2