In today's aquarium, the desire for carbon sources does not depend solely on carbon dioxide. In aquariums, there are other ways to replenish carbon sources.

One of them is to choose organic quality. Such as sugars, an appropriate amount is put into the aquarium, and after the decomposition of microorganisms, it can release carbon sources and be used by aquatic organisms. Glucose, a common sugar, can help the metabolism of aquatic organisms, and beneficial bacteria also rely on this to multiply and maintain the stability of water quality.

In addition, alcohols can also be a carbon source. Under certain conditions, ethanol can participate in biochemical reactions in water to provide carbon sources. However, it should be used with caution because of its improper concentration, or harm aquatic organisms.

There are other organic acids, such as acetic acid. It can ionize in water, release carbon sources, and can adjust the acid and alkali of water, suitable for the habitat of some special aquatic organisms.

When using various non-carbon dioxide carbon sources, it is necessary to pay attention to the change of water quality. Constant measurement of water quality parameters, such as pH, dissolved oxygen, etc., to maintain the balance of aquatic ecology. Otherwise, excessive or insufficient carbon sources will hinder the growth of organisms, and even endanger lives. Therefore, selecting an appropriate carbon source and controlling its dosage are essential for aquarium nourishment.