At what light level does supplementation with CO2 become helpful? I am getting mixed opinions. Using T5HO(x2) on a 55g tank [one is a red-spectrum biased "plant" bulb, the other a 6500K bulb], do I need to supplement with Flourish Excel? The lights run 10 hours/day and I am dosing twice a week with Flourish comprehensive. Algae is under control, and the plants are growing quite well. The microswords are putting out runners and the American Val has to have about 3-4 inches pruned/week to avoid blocking the light.
I understand Byron's very clear explanations regarding the balance of factors involved [Leibig's law of the minimum], but is is there a general opinion on when Excel is helpful and when lighting is too low to make Flourish Excel CO2 supplementation helpful? Are two T5HO's too little to need Excel supplementation?
I currently dose with Excel daily. I do know the Excel is not actually CO2, but a metabolic intermediate the plant can use similar to CO2. CO2 is just easier to say!
While injected CO2 is more cost-effective, I have no desire to go there.....yet!
David
I understand Byron's very clear explanations regarding the balance of factors involved [Leibig's law of the minimum], but is is there a general opinion on when Excel is helpful and when lighting is too low to make Flourish Excel CO2 supplementation helpful? Are two T5HO's too little to need Excel supplementation?
I currently dose with Excel daily. I do know the Excel is not actually CO2, but a metabolic intermediate the plant can use similar to CO2. CO2 is just easier to say!
While injected CO2 is more cost-effective, I have no desire to go there.....yet!
David