The 0-10-10 sounds like Alaska brand blossom booster.
That is probably the right stuff for the ones with the
purple leaves (purple often means phosphorus deficiency,
although it could be other things).
Could they be too wet in the larger pots? (Tips of leaves
dieing is often a symptom of that.)
Here are some good pictures of mineral deficiency
symptoms:
http://4e.plantphys.net/article.php?ch=5&id=289
(This kind of problem can be hard to correct in a planting
mix that really holds water well, because you need to wait
for it to dry before adding anything more to the soil.)