The only type of feeders I would suggest is ones you have bred, raised, and fed yourself. For the most part, it is better for the fish you have to eat the pellets so your Red Devil should be fine. The only other thing I would suggest is mix it up with some frozen bloodworms, shrimp, etc. for a more balanced diet.
Setting up visual barriers in your tank can sometimes help ease aggression, but not always. What size of a tank do you have all these guys in?
In regards to temp, as long as their isn't a huge fluctuation in the degrees it is fine. (The temps you posted sound fine) One last thing, when you say the LEDs turn on after midnight, are you saying that the fish are never in darkness?
Setting up visual barriers in your tank can sometimes help ease aggression, but not always. What size of a tank do you have all these guys in?
In regards to temp, as long as their isn't a huge fluctuation in the degrees it is fine. (The temps you posted sound fine) One last thing, when you say the LEDs turn on after midnight, are you saying that the fish are never in darkness?
