Well at 1bpm CO2, and phosphates and nitrates in source water,,you may not need much in the way of NP ,maybe a bit of pottasium ,maybe not.
Flourish comprehensive has a little bit of everything but as mentioned is mostly trace/water.
If you were to increase present lighting,CO2,then you may find you need a little bit more of everything.(or not depending on that in source water).
Just my two cent's.