Ok, checked the journal.
First thing to consider is the overall ratio light/excel. I am not saying it is off, but something you should be aware.
Glutaraldehyde alone cannot keep with high light. I am not telling you the threshold, this will be up to you. But if you push a lot of light, the rest might fall short, and each plant will show it in its own way.
What about the ferts, whats your dose? Something around 4ppm NO3, 1ppm PO4, 4ppm K, 0.05ppm Fe plus traces?
Root tabs might help, but not necessarily needed.
Another thing is circulation. Making sure you take the nutrients to the plants.
If you add the ferts, plus 1 degree GH, you covered everything. Check your water report and see if you have any Ca/Mg in there.
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