Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
I have noticed also that CO2 or carbon supplement's help .
In my Non CO2 injected tanks I can add daily dose of Metricide 14 and coax a little more red from plants , and can only imagine CO2 injection would produce even better result's.
I can almost see the Metricide's effect wear off six hours into photo period.
Can also make plant's appear a bit more red if they are so inclined by adding some pink bulbs in combination with daylight bulbs.
Doesn't make the red plant's any healthier ,just makes them appear a bit more red.
Also seems to me that plant's never look as red as they do right at first light from the CO2 they expel at night and or from small level's produced naturally through fish respiration and biological activity at/in the substrate.
Recall Tom Barr once saying that the CO2 which is naturally produced, is gobbled up by plant's within the first hour of lighting period.
Indicator plant's that I, observe for their red coloring are Echinodorus Red Flame along with Kliener Bar (sp) and ludwigia repens.
Don't think there will ever be substitute for the gas if is truly red's that one want's to see.
For me,I am happy with the low tech method and the Metricide which produces a little more red from the plant's.
Gonna retire next year and maybe give the gas a go then.