Description
CO2 is arguably the most important element in the planted aquarium. It is required for respiration and growth by all aquatic plants, used in a process called photosynthesis. Plants require a constant supply of CO2 during the light hours, otherwise they can suffer.
![Cryptocoryne wendtii 'Green'[Tc]](https://famouspets.ae/wp-content/uploads/2025/03/ROTALA-ORANGE-JUICE-68.jpg)
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