asked and answered;
if pearling is your objective;
Co2 is worthless without other traces
and traces are worthless without Co2.
I have a tank full of traces but low Co2,
and my plants don't pearl worth a damn.
with Light, photosynthesis is a 3 legged stool;
Co2, Macros, and Micros/Trace.
if one leg is missing, then no pearling.
if two legs are missing, low growth.
three missing legs? dead plants...