Philosophos;40431 said:TPN (Tropica Plant Nutrition) is more of a micronutrient than anything. I'm really wondering where that NO3 is coming from given that it doesn't contain any. Do you feed a lot by chance?
If you have a camera, a picture of your tank would be helpful to start.
How much light are you running, what type of fixture, and for how long?
You can read the main article on EI if you like
For NPK, Ca and Mg, try Equilibrium if you don't feel like mixing ferts up. I believe it's 1g/gal/wk to dose for EI.
Your CO2 almost definitely needs to go higher.