You might also consider making some "pappone" coral food. I think some folks on here use it and I might make up a batch and try it out.
As for DT's phyto, there are two "camps" out there, one says you can't raise clams without it, the other says it's a waste of money... I tried it and saw no difference with or without it. Sure it is a good product, but I think it's application is limited to the really small clams.
PS - yep, tony stewart fan, saw he got another one today :beer: