Refill packets for the Hagen CO2 Natural Plant SystemFresh Activator and Stabilizer packets ensure proper CO2 productionProvides a steady supply of CO2 for lush freshwater planted aquariumsKeep your Hagen CO2 Natural Plant System running at peak performance. Activator and Stabilizer Packets Replacement Activator and Stabilizer Packets ensure steady CO2 production for healthy aquarium plants. Easy-to-use replacement packets produce CO2 through natural fermentation process and supplies CO2 for up to 28 days.Bubble Counter/Diffuser CO2 bubbles move from the fermentation canister to the Bubble Counter/Diffuser. There, the bubbles follow a three dimensional route. This patented system has an extended diffusion path within a smaller area, providing longer contact time to ensure efficient diffusion (absorption) of CO2 into the aquarium.-->Please click on "More Information" for replacement instructions for Activator and Stabilizer Packets.

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