Mike....Genetics can play a role also on potential growth but think your regimen plan may not likely work because they are not normal fish as you speak.
You don't have to feed 7X day as the many of us do but water quality is a the key especially with Discus this young. Since they are only 1" and possibly selling for $5-$10 ea. from this local hobbyist I would say get a group of 8-10 and feed 3x - 4X day and siphon any left over food after 10 min. and top-off with aged water daily if this will work for you. Not a big expense and know your really itching for Discus based on your previous posts.
Gets you into the game without a big expense.
...Ralph