Seemingly stunted Rotala growth?

[Aesius]

My Rotala rotundifolia in my main tank has been growing much differently than it does in my 10g. There's new growth and roots, but the top leaves are very small, and mottled. Is this a lighting issue, or a nutrient deficiency?

http://imgur.com/q35cb



Tank specs -

29 gallon, 2 t5 HO 12000k lamps. Flourite substrate.

full line of flourish ferts dosed, root tabs.

[Gooberfish]

Co2?

[Aesius]

Originally Posted by Gooberfish

Co2?

No Co2, just Excel.

[ThatGuyWithTheFish]

I've never experienced stunting from a lack of CO2. I have noticed that this species of Rotala grows in smaller and tight together. It may be because of higher light.

[Aesius]

Originally Posted by ThatGuyWithTheFish

I've never experienced stunting from a lack of CO2. I have noticed that this species of Rotala grows in smaller and tight together. It may be because of higher light.

Do you think it would have anything to do with the 12000k bulbs? Should I find 6500k range ones instead?

[HD Blazingwolf]

Originally Posted by ThatGuyWithTheFish

I've never experienced stunting from a lack of CO2. I have noticed that this species of Rotala grows in smaller and tight together. It may be because of higher light.

ok.. smaller leaves with higher light levels will is a CLASSIC co2 deficiency

[HD Blazingwolf]

Originally Posted by Aesius

Do you think it would have anything to do with the 12000k bulbs? Should I find 6500k range ones instead?

12k isn't perfect but it works. u don't have to change ur bulbs because of this.

[Aesius]

Originally Posted by HD Blazingwolf

ok.. smaller leaves with higher light levels will is a CLASSIC co2 deficiency

Is this something I could remedy with increased excel dosing, or is this an issue only a Co2 unit would fix?

[HD Blazingwolf]

extra excel may work but its only a substitute.
co2 is the key.. or less light.. more light means more demand for nutrients, this includes co2