All plants require a source of carbon, which is why planted tanks require a reliable CO2 source. It is not enough to depend on atmospheric carbon dioxide to naturally dissolve at the water suface.
Seachem Flourish Excel is an excellent alternative to CO2 gas injection. Planted aquarium hobbyists will love the ease of supplementing their aquatic plants by simply adding Seachem Flourish Excel into the tank.
Bioavailable Carbon Source
The key benefit of Seachem Flourish Excel is that it is a source of bioavailable organic carbon for aquatic plants. The carbon molecules in Seachem Flourish Excel is readily absorbed by plants for photosynthesis benefits.