Just got a new Jack. About 2 inches. He was pitch black when I picked him up now he is light grey. My water is fine Could it be from a new tank? Or jut stressed because he is the smaller of the cichilds in the tank ?
its normal for jacks to go black...moods will do that as others have said...and hes telling you the africans probably aren't playing nice.....africans also have different water/food requirements and jd's don't belong in with them
he needs different food(meats) and ph levels than the others...and from my experience with both africans and jd's , he won't ever be able to be more dominant with africans...especially the more the africans grow.....but goodluck!