If your tank is quite literally full of Anubias then you need to dose ferts. doesn't matter what light you have. The fact that you are adding CO2 at all will also be increasing the growth rate considerably.
Anubias devour nutrient and particularly trace elements. there is no chance that a tank full of them will get what they need from fish waste/food alone and with CO2 you are adding to that defficiency
Not EI levels of course but I would either remove CO2 and dose lightly with half a lean dosing regime like PPS Pro or leave the CO2 on and dose full PPS Pro.