John, your Kermit the Frog looks pretty similar to my Ultra Emeralds;
I had frags of this scattered all over the tank, the best color retention and growth was mid level (12" down under 6 bulb t5 lighting). Those in the top 6" did not reproduce, got smaller, and turned a much lighter shade of green. Those on the bottom stayed large, retained good color, but also didn't reproduce. I'll try and get some photos of the various frags posted up.