Hugo Return Pipe 17mm wood generating pure CO2 through a

generating pure CO2 through a chemical process

the ideal media for your root plants

But they are made from natural wood

have a look at the Colombo CO2 Reactor or Tropica CO2 Nano System

frost-free

Hugo Return Pipe 17mm wood generating pure CO2 through aStainless steel return pipe offers an incredibly durable and sleek alternative to standard filter returns for a variety of different types of aquarium filters or pumps. It is resistant to rust and corrosion in freshwater (not for use in saltwater aquariums) and is perfectly designed to allow for significant smooth water flow from any filter or pump. The dark interior of the pipe prevents algae from clogging the flow over time. It is available in two