Thanks for your reply. I found the composition of the product here: http://www.liquinox.com/PDF/msdsironzinc.pdf
Here's a bit more info on my tank.
Lighting: Fishneedit 150w MH w/8000k FNI bulb
Lighting period: 8 hours
Substrate: Mineralized topsoil with aquariumplants dot com substrate cap
Dosing: EI w/dry ferts using recommended schedule by Rex Grigg
Everything in my tank is growing very well. The limnophila does get pink towards the upper 1/3 of the plant but it's lost the deep pink/magenta coloration throughout the entire length of the plant. I'll post a picture tomorrow when the lights come back on so y'all can see. Everyone loves pictures!