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Adding CO2 to the aquarium can be complicated, but with the right accessories it becomes relatively easy. Also when you need to attach multiple aquariums to one system, you can find everything you need here.
This is a refill CO2 cartridge for the ADA CO2 System 74-YA/ver.2. This CO2 refill can be easily connected to the ADA CO2 System 74-YA/ver.2. The CO2 that comes from this cartridge is lightly perfumed.