John- I had an evil mel's hairy green mille under PC's for a few months and it did alright. That said, I had it all the way at the top of the water and even then, I didn't get a whole lot of growth out of it until I moved it into a new set-up with better lighting. I now have moved it almost onto the sandbed of my 90 and it's doing fine (T5's). It's not growing as fast as it was up high, but I'm actually getting much more green color and better polyp extension.