Switching from CSM+B+Extra Fe to TMG caused some issues

[Wet]

I went from CSM+B+Extra Fe at .3ppm Fe 3*week to TMG at 2mL (~10gal of water, ~2x recommended dose) 3*week about a month and a half ago. My hope was the better chelator of TMG would mean Fe target was not so important. I have these issues:

Curling on L. brevipes

Small leaves from L. inclinata and yellow tips from R. rotundifolia "colorata"

Melting R. macrandra:

Melting P. stellata BL (though needs to be split):

My EI for the past year or so has been:
~10ppm NO3, ~3ppm PO4, >40ppm K, 50% water change weekly

My current CO2 is
4 dkH, 6.4 pH, >40ppm CO2

My plan is to increase TMG to 3mL 3*week and add an additional .1ppm from CSM+B+Extra Fe. Right track or do I need to look elsewhere? Is it possible the curling leaves means I must look closer at Ca, and that Ca dropped because of the quality of TMG or some such?

Thank you.
Joe

 

[quenton]

Re: Switching from CSM+B+Extra Fe to TMG caused some issues

What is your tank size?

How much (in tsp or grams) are you dosing?

With that info, people can comment on it??

 

[Wet]

Re: Switching from CSM+B+Extra Fe to TMG caused some issues

8gal main + 10gal sump/paludarium (approx 2 gallons of additional water), reverse photoperiods. I am rounding down on volume. Reverse photoperiod bottoms out nutrients quickly: I cut N dosing close... maybe too close.

3x a week, dry
~ 0.8g KNO3
~ 0.2g KH2PO4

? KCl from solution after water change: this is bonus K dosed liberally from my anecdotal experience that it makes plants look better. Last I did the math I was adding near 30ppm K from this. My KCl is in nuggets and I no longer take the time to measure it. I am dosing from the same solution I have used for ~3months.

Only change besides trimming/plants during this has been TMG though. My NPK targets have been essentially the same for a year, just slight tweaking for effect.

Thank you,
Joe