For those that don't have both:
Tropica Master Grow contents: K 0.79%, Mg 0.39%, S 1.01%, B 0.004%, Cu 0.006%, Fe 0.07%, Mn 0.04%, Mo 0.002% Zn 0.002%. HEEDTA and DTPA as chelators.
Flourish contents: Total Nitrogen (N): 0.04%; Available Phosphate (as P2O5): < 0.0100%; Soluble Potash (K2O): <0.0600%; Ca (Calcium): 0.1736%; Mg (Magnesium): 0.1154%; S (Sulfur): 0.2773%; B (Boron): 0.0096%; Br (Bromine(as bromide): 0.0001; Cl (Chlorine(as chloride): 1.15%; Co (Cobalt): 0.0004%; Cu (Copper): 0.0001%; I (Iodine (as iodide)): 0.0001%; Fe (Iron/Ferrous gluconate): 0.3886%; Mn (Manganese): 0.0125%; Mo (Molybdenum): 0.0015%; Ni (Nickel): 0.00036%; Rb (Rubidium): 0.0001%; Na (Sodium): 0.0743%; Sn (Tin): 0.000030%; V (Vanadium): 0.000030%; Zn (Zinc): 0.0004%; Arginine: 0.016%; Glutamate: 0.09%; Lysine: 0.03%; Tyrosine: 0.019%; Choline: 0.0004%; Inositol: 0.0011%; Biotin: 0.0004%; Niacin: 0.025%; Pantothenate: 0.0070%; RiboÅavin: 0.0020%;Thiamine: 0.0020%; Vitamin B12: 0.00009%; Vitamin C: 1.0%
Flourish does not contain nitrate or phosphate per se, but it does supply a nitrogen source, the Nitrogen equivalent being 400 ppm in the bottle. Phosphorous is not available as free phosphate but as phosphate
esters (100 ppm). Flourish does in fact contain potassium (600 ppm)
but like with the iron, you wouldn't want to use Flourish as the sole
source of potassium maintenance if the potassium is heavily utilized.