Don't feel bad Chris, I lost most of the red color on my colony. My tank has been in shambles over the last few months, but I have it under control now. This tenuis is a PITA to keep color. It had the best red color when my nitrates were 10ppm, po4 .03, and I was feeding 3 times daily with 20 something fish in a 130g system. I was also doing prodibio/specialblend/nite out.
Now, I'm not sure if it's the feedings, or bacteria/carbon dosing, or the combination of both. Definitely something about this is key. In a regular low nutrient tank under 400w radium this corals remains a solid blue. I had this coral for several months in an old low nutrient system(same light) and never saw the red highlights until it hit my current system.
I'm trying my best to get he colors back now. I'll post with future progress.