I used both but I do not follow the prescribed dosage. I dose Aqua to give me 20~30ppm of K weekly and supplement it with Micro for Fe to 0.1~0.2ppm weekly (taking into account water change).
I assume all the N from Aqua comes from KNO3 and calculated the dosage of NO3 to be around 10~20ppm if Aqua is dosed for a level of 20~30ppm K. Note that Fe available for plants is only 13% of the specified EDTA FE mass.
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