Hmm... Think about something:
You run your tank using 3 fertilizers - N, P, and Fe/Traces. Ok, four - add the 30 ppm CO2.
Do you think that an aquarium is more than that?
Try to lower the N to about 20. And adjust the P to about 1. Change big amounts of water. That is what EI suggests - N between 5 -20, P between 0.5 - 2.0, and big water changes. Adjust all other fertilizers according to EI.
What do you think it will happen? Here it is again: Do you think that an aquarium is more than that?
Go back to basics. For example find out what is "clean water". It would help to learn how the Japanese run their planted tanks.
A good idea is also to make sure that the test kits you are using actually work. Cheap kits can show you only a trend, but don't believe absolute values too much.
And that is how it goes... Not exactly the way it appears on an internet forum.