Hi,
I would think it is Nitrogen gas (N2) if it is in a pressurized container.
I don't know about aquatic plants but land growing plants have a hard time utilizing nitrogen from the atmosphere. Legumes are quite good at it though but they cheat and house bacteria in their root nodules that incorporate the atmospheric nitrogen into organic compounds that the plant can use.
/Wheat
I would think it is Nitrogen gas (N2) if it is in a pressurized container.
I don't know about aquatic plants but land growing plants have a hard time utilizing nitrogen from the atmosphere. Legumes are quite good at it though but they cheat and house bacteria in their root nodules that incorporate the atmospheric nitrogen into organic compounds that the plant can use.
/Wheat