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Seachem Flourish Excel

Seachem Flourish Excel

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Seachem Flourish Excel is a source of bioavailable organic carbon that caters for your aquatic plant's natural need for CO2. Ideally used after a water change, Flourish Excel will provide the right amount of carbon compounds to promote photosynthesis - essential for lush plant growth and to oxygenate the water. It introduces the finished compound bypassing the need for a CO2 system, although the two processes can work together with no ill effects. The product also has iron reducing properties which encourage the ferrous state of iron (Fe+2), which plants can consume easily. Iron is vital for healthy growth, so levels must be replenished routinely.

Key Features:

  • To provide carbon for plants CO2
  • Oxygenates aquarium water
  • Iron reducing properties


On initial use or after a major (> 40%) water change, use 5ml for every 40 litres. Then use 5ml for every 200 litres daily or every other day. Dosing may be slowly increased in high-growth aquariums

  • 100ml treats 800 litres / 200 gallons
  • 250ml treats 2000 litres / 500 gallons
  • 500ml treats 4000 litres / 1000 gallons
  • 2 litres treats 16,000 litres / 4000 gallons
  • 4 litres treats 32,000 litres / 8000 gallons

Please note that the above dosages are intended as a guide for a first day aquarium and dosages should be adapted thereafter according to the below directions.