Seachem Flourish Excel Organic Carbon

Seachem Flourish Excel is a source of bioavailable organic carbon for aquarium plants. Plants need carbon to build the compounds used in growth. In an aquarium, that carbon commonly comes from CO2, but suitable organic compounds can also contribute.

Organic carbon for the planted aquarium

Flourish Excel supplies compounds that plants can use in carbon-building processes associated with photosynthesis. Seachem describes their structure as similar to certain photosynthetic intermediates. The product does not contain the named intermediates themselves, such as ribulose 1,5-bisphosphate or 2-carboxy-3-keto-D-arabinitol 1,5-bisphosphate.

This distinction matters when planning the aquarium’s carbon supply: a liquid organic carbon product and injected CO2 are different inputs. Seachem Flourish Excel can be used alone or with CO2 injection, following the product directions and the needs of the planting.

Iron-reducing properties

The formula also has iron-reducing properties that promote ferrous iron (Fe²⁺) over ferric iron (Fe³⁺). Ferrous iron is more readily used by plants. This property complements the product’s role as an organic carbon source.

Integrating it into a routine

When combining products, assess the aquarium as a whole rather than increasing CO2 without considering the effect on pH. Use the dosing instructions supplied with Flourish Excel and avoid treating a liquid carbon supplement as a reason to disregard the conditions in the tank.

Size options

• 100 mL.
• 250 mL.
• 500 mL.
• 2 L.

Select the required bottle size before adding the product to your cart. The size choice determines the volume supplied, while the product’s intended use remains the same.