Good afternoon all, I have had aquariums for over 20 years but have only just got into using co2 for my plants, I'm hoping to learn a lot from this forum to improve my knowledge and increase my ability in this wonderful hobby of ours. I have a Juwel 240 litre tank with a internal and external filtration. I'm using the Fzone co2 "kg bottle that uses Bicarb and citric acid for my plants.