Carbo Plus is a bottle free C02 system that works well and is safe to have in the house. You simply plug it into the mains power and adjustable unit provides your aquarium plants with their vital supply of carbon dioxide.
Using a simple to use control box with leads to guide you connected to a carbon rod located in the aquarium. Water is converted into hydrogen and oxygen by electrolysis. The hydrogen rises up and the oxygen combines with the carbon in the carbon plate to form carbon dioxide, most of which dissolves immediately.
There has never been a simpler controllable C02 system available in Australia.
The carbon rod dissolves as it is used up. If the Carbo Plus is connected to a timer along with your aquarium lights the carbon plate should last about 4 months in a 500ltr aquarium.
Then you simply change the carbon plate and its ready to go again.