oh I know what they were eating, The breeder said that they were eating beef heart, krill, flake food and tetra color bits, I might go out and try to get something with krill in it, I'm not sure what tetra color bits are but I'll look for those too.
'sounds like you've taken on a real challenge - trying to rasie juvie discus in a dosed, planted tank.
The nitrates sound high to me for juvie discus. I think most people try to keep them lower.