Any suggestions for foods or feeding technics for these small fry?
When I was growing out a group of 6 jags, I just threw a mixture of all the Hikari pellets I had into a cup and crushed the lot together (cichlid gold, massivore, algae wafers, food sticks, carnivore pellets) and it seemed to work well. I grew out the 6 in a 90g and still lost 3 due to the pecking order establishment, so I would expect to lose a few in that 30g. All turned out well though, I ended up with a male and 2 females. The male is now 7" and has the 90g to himself, he'll have a 180g early next year.