N/P are fine, I wouldnt touch those either... your iron dosing is low, I would up that to 1ppm daily to start.
Another problem I see is I wouldnt waste my time on Flourish Trace...change to Flourish. The only people who might
benefit from adding Trace is those using R/O water, other then that its a waste of money IMO.
For my own personal curiousity, I bought a 500ml bottle and dosed it in place of Flourish just too see the results and the plants went downhill. It cannot be used without Flourish, but Flourish can be used without Trace.
Growth actually stunted, the plants had frail new growth and the oldest growth began to lose color after 1 month of its use "without" adding the normal Flourish. If that stuff cant even sustain coloring after that short of time, how much help can it be ? It aint cheap either !!! LOL
Like I said , maybe the R/O users would see a difference but IMO everyday tap water ,whether its well or city water, has everything that Trace has.... as soon as I started redosing the Flourish again, the plants responded within 1 week with their good color's and overall appearance.
I poured the rest of the Trace down the drain.
This could be part of the problem maybe...everything else seems to be in order.