Quite a bit, see the list below. The plant growth has been great and I don't really notice any significant deficiencies.
Rotala, Italian Val, Ludwigia, Java Fern, Amazon Sword, Anubias, Crypt W.
I'm aware, I assumed that Excel on an auto-doser would be enough but I am second guessing this now. CO2 is in the pipeline.
I don't have any experience dosing P&K, I'm not sure how to measure it. I'm hesitant to move over to a full EI schedule without CO2
My plants showed Iron deficiencies even with the root tabs. Since I started dosing iron they have gone away. This is why I dose even with tap water.
If you look at Rotala Butterfly
it makes things super simple for figuring out EI dosing whether you want to do it daily, normal EI schedule or low light/weekly dosage schedule. It also allows you to calculate what you need to mix the dry ferts into a solution for use with your auto doser if you want.
I definitely recommend you implement Co2 at some point, even though it's slightly overwhelming at first it's totally worth it.