Hagen Nutrafin CO2 System Natural Plant System w/CO2 Activator & Stabilizer

Hagen CO2 Natural Plant System w/CO2 Activator & Stabilizer by Hagen.

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This system has been designed to supply any aquarium with a safe, economical and efficient method of providing aquarium plants with nature's most powerful carbon source for plants.
Employing a natural fermentation process for CO-2 eliminates the need for inconvenient pressurized cylinders. The system allows quick, easy and economical refills of ingredients to provide continuous CO-2 for a 3-4 week period. The special fermentation canister has been developed to support consistent carbon dioxide output.
Comes with: Fermentation canister, bubble counter/diffuser, CO-2 resistant airline tubing, 3 suction cups and a holder, 3 activator and 3 stabilizer packets (good for a 3 months supply).
Good for aquarium up to 20 gallons.

Size: 3" diameter x 7 3/4" high (8 1/4" with airline adapter)

How it works:
Once the fermentation contents are sealed in the canister, fermenation takes place, which causes the creation and expulsion of CO-2.
The fermentation canister has a Thermo-Regulation system that buffers abrupt changes in temperature inside the canister caused by external temperature variations.
Additionally, the patented Pressure-Release safety cover prevents internal pressure from exceeding safe limits.
The CO-2 bubbles move from the fermentation canister to the bubble counter. There, the bubbles follow a 3 dimensional route.
This system has an extended diffusion path within a smaller area, providing longer contact time to ensure efficient diffusion (absorption) of CO-2 into the aquarium.