It seems like whenever I am having appetite issues, a dose of blackworms after each meal seems to revitalize them.. I would hold off seafood for a day or two, and then feed them a light amount of krill, followed by a huge portion of live blackworms. Do this late at night.. It seems to 'expand' their stomachs, and for days afterwards they eat really well, back to normal.
Like I said before.. Ever since I switched them over to barebottom their appetite seems to be enhanced, but it could of been because I was trying to starve them on to pellets prior!!
Thanks for all the kind words everyone..