Description
Seachem Flourish Excel is a product that is made to provide organic carbon to planted aquariums. It is an alternative to CO2 injection or can be used in addition to it. It is also a source of photosynthetic intermediates which are needed by plants. Seachem Flourish Excel is structurally similar to photosynthetic intermediates and can be easily converted into any one of these compounds. It is best to use Seachem Flourish Excel on initial use or after a water change, when dosing can be slowly increased in high-growth aquariums. For smaller doses, each cap thread is approximately 1 mL.
Seachem 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
Seachem 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 Flourish Excel either alone or in conjunction with CO2 . The combination is particularly ideal for situations when continuing to add CO2 could result in dangerously low pH levels. Flourish Excel also has iron reducing properties which promote the ferrous state of iron (Fe+2), which is more easily utilized by plants than ferric iron (Fe+3).
Why It's Different
The reason plants need CO2 is to produce longer-chain carbon compounds also known as photosynthetic intermediates. Photosynthetic intermediates include compounds such as ribulose 1,5-bisphosphate, and 2-carboxy-3-keto-D-arabinitol 1,5 bisphosphate. Although the names are complicated, the structures are quite simple (5 carbon chains). Flourish Excel does not contain these specific compounds per se, but one that is quite similar. By dosing with Flourish Excel you bypass the involvement of CO2 and introduce the already finished, structurally similar compounds. It is in its structural similarity that Flourish Excel is able to be utilized in the carbon chain-building process of photosynthesis. Simple chemical or enzymatic steps can easily convert it to any one to any one of the above-named compounds (or a variety of others).
Directions
On initial use or after a major (> 40%) water change, use 1 capful (5 mL) for every 40 L (10 gallons*). Thereafter use 1 capful for every 200 L (50 gallons*) daily or every other day. Dosing may be slowly increased in high-growth aquariums. For smaller dosing please note that each cap thread is approximately 1 mL.
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