Well I'll try it, but what I am trying to achieve with this? I have good growth with other species and little algae. You think this plant isn't growing because there is too much light and too little CO2? If I up the CO2, I have dead fish. Or is it that you are saying the plant I'm having trouble with isn't able to compete with the other species because the light level is overdriving their uptake of the CO2? Just help me understand the why of this.
It is a bit of both actually.
Light is what drives plant growth and the subsequent nutrient demand.
I PERSONALLY think the aromatica is lacking c02. Since upping your c02 is impossible as you feel you are at the max (is that correct?), then the only other option is to lower the light and thus lessen the demand.
How DO you measure c02 by the way?
Keep in mind that not all plants use/assimilate/require the same amount of c02 in the same time frame. Note too that c02 does not stay in solution that long. Since some plants can fix c02 more rapidly/readily, they will do better in a limited environment.
It is a good indicator actually of something amiss when a specific plant does NOT do well, but many others do in the same tank. Why is that? Aromatica is not a difficult plant by any means provided it has the means to do well. This leads me to think c02, since macro and micros are easy to rule out.
To do so, I would increase my EI as stated (more plant = more nutes) and do a WEEKLY water change and an extra thrown in mid-week if possible. This will address any possible macro/micro deficiencies. Since we both think you have enough light, what is left?????? c02
TRY the lower light for a couple/few weeks and see how it works. You can always go back to where you are now.
Not sure if you have many varieties of plants or what????
Don;t forget that good flow and circulation is also key. A dirty filter could be affecting more than you know... are you keeping up with general maintenace?
Sorry for all the questions, but I cannot see your tank or know your schedule, and diagnosing from afar, doesn't always work well
In addition, patience, I know it is frustrating
This is good advice. It may take several weeks for the plant to come around once conditions are optimal.
Also check your plants themselves, they may need a trim and flow is blocked, shading occurs, etc. Less mass to use the available nute pool.
I would not dare to think I could speak for Gerry
Trust me when I say that I wish folks HAD dared in my checkered past LOL
Hope this helps.