Seachem Aquarium accessories Flourish Excel 500 ml

Source liquid bioavailable organic carbon. Alternative to CO2 injectors. Flourish Excel is a source liquid organic carbon directly assimilable by plants. It can be an alternative to gaseous CO2 injection systems. It converts ferric iron (Fe3+) into ferrous iron (Fe2+), more easily assimilated by aquatic plants. With Flourish Excel, it's never been easier to add carbon to planted aquariums. 500 ml treats 20,000 l.