Why do people inject carbon dioxide in aquaria?

This is a good paper supporting the reason why some of us just can’t seem to get our plants to flourish, and why some aquarists who are into their planted tanks use carbon dioxide injection (provided that plant nutrients are also available [fertilizers and trace minerals]). So, if you want a beautiful underwater garden, you’ll need to invest in a carbon dioxide injection system.

Aquatic Botany
Volume 110, Number 1-2 (October 2013)
	CO2 availability rather than light and temperature determines growth and phenotypical responses in submerged Myriophyllum aquaticum
	Authors:	Ana Carlota Eusebio Malheiro, Peter Jahns, Andreas Hussner
	Author Affiliations:	no affiliations available
	Source:	Aquatic Botany, Volume 110, Number 1-2 (October 2013)
	Page Numbers:	31 – 37
	Available Full Text:	Full Text: Subscription Required to view full text Format: PDF Size: Unknown Location: Publisher’s Site Authentication: Publisher’s Site
	Abstract:	•We studied the impact of light, temperature and carbon on growth of submerged Myriophyllum aquaticum.•CO2 acts as the major trigger for plant growth, rather than light and temperature.•M. aquaticum responded to changes in CO2 with both morphological and physiological acclimations.
	Citation:	Ana Carlota Eusebio Malheiro, Peter Jahns, Andreas Hussner . CO2 availability rather than light and temperature determines growth and phenotypical responses in submerged Myriophyllum aquaticum. Aquatic Botany, Volume 110, Numbers 1-2 (October 2013), pp. 31-37, <http://ejournals.ebsco.com/direct.asp?ArticleID=47E9A159ADBAE30672DA&gt;
	URL:	http://ejournals.ebsco.com/direct.asp?ArticleID=47E9A159ADBAE30672DA