EI tunnel vision is super strong in this forum - because most of the crowd comes from one place.
Dennis I love your posts and points of view. I read them, and them reread them, and try to figure out how I can take that information and apply it my own tank. As anyone can see, your results speak volumes.
But I am not sure what you mean by EI tunnel vision. I don't know of many that are blindly following EI here. In fact, there have been quite a few here testing lower dosing schemes. Myself I am front loading macros at NO3 about 1/2 EI, and daily custom micros at 1/4 EI. And with good results.
And like you have said, I agree CO2, light, and even more important husbandry play a more important role than dosing. Each needs to be taken seriously. IMO, more focus on those aspects allow for a wide variety of dosing schemes to be successful. Reminds me of your earlier thread on the over emphasis on dosing.
My guess is that your tanks would look great at 1/4, 1/3, or 1/2 EI dosing. Just saying I don't think dosing is the primary reason for your success, and the difference might be negligible.
And by the way, you inspired me to up my PAR levels. Could be disaster, but we will see what happens.