Originally Posted by coralbandit
If they have cover and are happy they should color up pretty quick.
How many do you have ? They prefer schools of their own company .
Dimming the light may help.
Any other fish in tank with them ?
Thanks. They are slowly coloring up. I can now see the full red at bottom. Just not very dark red and i have 12 cardinals with medium sized angelfish, one betta and one electric blue ram. All fish are in harmony. Since i introduced angelfish the cardinals swimming in more tight school and colored up more. Angelfish is not interested in them at all. Light unfortunately i can't dim because have high light demanding plants.