Meisen,
I still have both of your's. The African 'blue' hasn't grown for me like the electric blue (Apex's from Nashville, Jan 08). I had some wild times with it, too. I cut a piece for a friend as a back up piece. His frag grew to four times the size of the frag I cut it from in a week (sitting side by side). He put it in a 300, ~4" from the surface under 400W MH, and it exploded. He doesn't feed much at all, but has some hair algae and majano's, so there is some nutrient there somewhere.
I took a piece back from him and put it in my cess pool, and it exploded. The cess pool was a 50 gallon livestock tub connected to a 40B. No biological filtration aside from the glass

. Inch to two inch detritus drifts, and it exploded. Lighting there was 175W Ushio 14k's.
I consolidated systems and went to T5's. For the first six months, it continued to grow like mad. High nutrient in that tank, too (no skimmer for over two years, water changes, maybe once every three or four months). It started slowing down then. Wanted to move the mother colony into my back room, and it has started to decline. Still ahve plenty of it, but it isn't thriving like it was a year ago. That system is high nutrient, too, but lower light.
What I've noticed is that strong lighting and decent flow gave me the best polyp extension. Got into many an argument with people stating it wasn't Cespitularia because it had full polyp extension... Under lower flow and light, the ends look more like fingers than baskety polyps. This is the best looking oral I've ever seen in the sun. Mine don't glow under sunlight/flashlight now like they did eight months ago, or so, so something is up...