09-30-2010, 06:07 PM
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Lisa is quite correct. I would add more plants to break up the tank. "Out of sight, out of mind" is a true maxim for these fish. The chasing of one fish by the other can get serious depending upon the temperament of the fish, and environmental factors (like the plants, hiding spots, etc) can affect their respective temperaments.
While some "pushing and shoving" is normal and usually tolerable, sometimes a fish particularly a male will become very aggressive and hound the other fish literally to death. Keep an eye on them, try to ascertain if the chasing is all by the same fish, and how far it goes. The male and female of a mated pair will sometimes become annoyed with the mate, so this is not just a male only issue. My Bolivian Ram pair behave like this regularly; between spawnings the male will sometimes really push the female around, other times she fights back, even locking jaws. They are in a 115g planted tank.