Yes I have to agree with what was said above, The stronger the lighting the faster they will grow. I have 2-250w MH on mine and my zenia does grow like weeds! I actually pull it out and throw it in the trash every few weeks when it grows on stuff I cant remove for frags.
It will grow on every rock it can reach, glass, powerheads, wire, on anything in the water. I have known some people to grow it in thier fuge's to harvest then remove nutrients out of the system.
Escape