I was thinking of their product called "Fresh Trace" when you said Flourish Trace...didn't realize they had one for the planted tank. Here is the Guaranteed Analysis of both Flourish and Flourish Trace. From what I can tell the only things Flourish Trace have that Flourish does not is Rubidium, Nickel, and Vanadium which are pretty obscure traces IMO. These elements are so insignificant in the larger scheme of things that I think it would be hard to justify the cost or hassle of dosing Flourish trace. If the plants need these elements at all it would be a very little bit and most likely all one would need would be in the tap water unless someone is using straight RO water for some reason.
Guaranteed Analysis (Flourish trace)Boron (B)
0.0028%
Cobalt (Co)
0.00003%
Copper Cu)
0.0032%
0.0032% Soluble Copper (Cu)
Manganese (Mn)
0.085%
0.0085%Soluble Manganese(Mn)
Molybdenum (Mo)
0.0003%
Zinc (Zn)
0.0169%
0.0169% Soluble Zinc (Zn)
Rubidium (Rh)
0.000008%
Nickel (Ni)
0.000003%
Vanadium (V)
0.000002%
Guaranteed Analysis (Flourish)Total Nitrogen
0.07%
Available Phosphate ( P2O5)
0.01%
Soluble Potash
0.37%
Calcium (Ca)
0.14%
Magnesium (Mg)
0.11%
Sulfur (S)
0.2773%
Boron (B)
0.009%
Chlorine (Cl)
1.15%
Cobalt (Co)
0.0004%
Copper (Cu)
0.0001%
Iron (Fe)
0.32%
Manganese (Mn)
0.0118%
Molybdenum (Mo)
0.0009%
Sodium (Na)
0.13%
Zinc (Zn)
0.0007%