Texas Todd. That's very informative! Thanks for sharing your insights.
I only do LPS and Softs and my tank isn't very deep but I would love a clam.

Interesting about the actinics. My 11Ks are Giesemann's. I might get some Giesemann's Actinics to replace the ones that came with my fixture to at least get the 'better' T5 actinics...