You(feller from the UK) are okay with about 1/2.
Lower light+ sediment + rich tap.
DC: I think you need to offer more details, there's a lot more to growing plants than N and P
Light/CO2, volume etc...........
EI is not just for heavily planted tanks with high light.
I do not have high light etc, but use EI.
You can and likely should modify to suit, the ranges listed are starting points only......in otherwords, ranges you can be fairly safe knowing you are not limiting plant nutrients.
This way, you can focus on light, or CO2 with out any dependencies/interference from dosing issues.
Then slowly reduce the dosing once the light/CO2 are correctly set.
Then you might be able to reduce the water changes etc from there.
Adding rich sediment also makes it easier to dose less.
I think many people seem to have a bias to assume that higher NO3/PO4 are somehow bad and impose "risk", however, no one has yet to kill their fish even with some rather monsterous mistakes in dosing, so such assumed risk claims are exaggerated and some are simply false/lies etc.
Nearly every week, someone gasses their fish. There's risk, but no one wants to face up to the real statistics about just where the risk really is
Have anyone seen me suggest high light before?
I likely have but only in extremely extremely rare cvases where I knew the person was very competent and had a specific goal.
This high light disease(HLD) causes far more issues, risk, less wiggle room/ room for error than anything to do with nutrients as well. Where's the the fear and risk there?
These are general myths and issues many have coming to this hobby, and it is not directed at anyone specifically. I have tried to mitigate this stuff, but dang, a good myth is really hard to kill