Μαύρη άλγη και excel

[Πάνος]

Is Flourish Excel a replacement for CO2 in a planted aquarium?

Yes and no. It provides the same benefit as CO2, i.e. it provides the plants with a source of carbon for growth just as CO2 provides them with carbon. However CO2 by itself will give you quantitatively more growth than Excel by itself, although Excel does provide a substantial amount in comparison. If CO2 is a 10, Excel is a 6-7. Using both together provides additional benefit. One of the advantages of the Excel is no up front equipment costs and complexity of valves, hoses and regulators, etc.

πηγη: http://www.seachem.com/support/FAQs/FlourishExcel.html