Wat is this product?
Do you want to know how many bubbles of CO2 you should add to your tank so that you can keep the amount of CO2 nice and constant and your plants can grow optimally?
Do you want to avoid gassing your fish by accidentally adjusting your needle valve incorrectly?
This “Bulb” CO2 bubble counter can help you with that. Just fill it with some water, install it on the CO2 hose … and you’re done. And it looks pretty stylish too!