Flourish Excel™
Bioavailable organic carbon source for the planted aquarium
Use as an alternative to CO2 injection or in addition to it
Introduces photosynthetic intermediates
Overview
Flourish Excel™ is a source of bioavailable organic carbon. All plants require a source of carbon. This is typically obtained from CO2, but may also be derived from simple organic compounds (such as photosynthetic intermediates). The use of either CO2 injection or Flourish Excel™ does not necessarily negate the use of the other. Because the processes of producing photosynthetic intermediates and building onto them occur simultaneously, one can derive a substantial benefit with the use of both.
| Product Information |
|---|
| Brand: Seachem |
| Volume: 250ml |
| Form: Liquid |
FAQ
Can Flourish Excel be used with CO2 injection?
Yes, Flourish Excel can be used with CO2 injection. The two methods complement each other and can provide enhanced plant growth.
What type of plants benefits most from Flourish Excel?
Flourish Excel is especially beneficial for planted aquariums with a variety of aquatic plants, particularly those that require additional organic carbon for healthy growth.
How often should Flourish Excel be added to the aquarium?
The frequency depends on plant needs and water conditions. Generally, a small dose once a week is sufficient for most setups. Adjust based on plant response and water parameters.

Kevin Hart –
My planted tank has shown much better leaf growth since I started using Flourish Excel. It works well with my existing CO2 system and doesn’t cause any water quality issues. Easy to dose and visible results in a few weeks.
Jan Quinn –
I used it as a supplement to my CO2 setup. The plants seem more vibrant and the coloration has improved. It’s a simple addition that I’d recommend for beginners or those with moderate plant needs.
Sally Parsons –
After switching from pure CO2 to using Flourish Excel in combination, my aquarium plants grew faster and more evenly. The water remains stable, and I don’t have to worry about CO2 buildup.