Well, all I know is that light, nutrients, and co2, are all directly dependent on each other, meaning you can't just increase one and expect results, well, not necessarily. My system is out of balance in that I have too much light and nutrients when compared to co2, meaning, adding more lights or nutrients wouldn't help. I wonder, would it cause an algae bloom if I added more of that stuff? I doubt it. I think instability in general (shocked plants) is what causes algae blooms (when algae is present), not the imbalance, or did I miss something? Anyhow, doesn't the pH and temp affect how much co2 you can dose before it's just wasted? Apparently, according to a post above, that's not the case with liquid co2, at least that's what I understood.
Okay, after that rant, to figure out whether or not you could use more co2...
Make sure you keep your fertilizer levels consistent, or at least, keep the swings to a minimum, and reoccurring consistently. This stabilizes the environment enough for you to test each factor individually.
Once you have the swing of that down, add more light. Do the plants react favorably? That means there wasn't enough light for the amount of ferts and co2, so no, you didn't need more. If the plants don't react favorably, then either more co2, or more fertilizer (consistent nitrate levels) is needed.
I'm totally new to this, so by all means, if someone sees that I'm wrong, please correct me. For all I know, my advice could shock your plants and cause an algae bloom. I hope someone does clarify. Please do come back and tell us what you figured. and how. I'm thinking about using liquid co2.
Last edited by mef1975; 02-17-2014 at 02:12 AM.