Out of stock since Fri 19th May 2017, due back Fri 26th May 2017.
Carbon is an essential nutrient for all plants. They absorb it as carbon dioxide. Carbon levels are often too low in the bottom of the aquarium so the plants do not get what they require. This refill bottle contains 11 grams of CO2 and should be used with the Tetra Plant CO2 Optimat kit.
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