Sera CO2 Tablets

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Sera CO2 Tablets 20 Tablets CO2 fertilizer tablets for the CO2 diffusion reactor sera CO2 Tabs are simply placed into the according slot of the CO2 diffusion reactor. Upon contact with aquarium water, each tablet releases approx. 100 ml (representing 2,500 counting bubbles) of CO2 .Aquariums up to 45 Liters; one CO2-Tab every third to fourth day.Aquariums up to 90 Liters; one CO2-Tab every second to third day.Aquariums between 120-170 Liters; one CO2-Tab every second day. Show more