Maltimomma
Aquarium Advice Freak
I have 3 pearl danio in a 55 gallon tank. I've had them about 6 weeks. They have been very actively swimming together. Yesterday I noticed one in the corner of the tank and when it would try to swim out the largest one would chase it back. Last night the larger one was chasing the third one unmercifully in a tight circle and around the tank. After about 2 hours of this we caught the larger one and put it in the other 55 gallon tank and now all is calm again. My concern was that the one who was being chased would get so stressed it would die. Do you think that may have been mating or just aggression? I really wanted 4 in each tank as they are so pretty and active. Now I don't know if I should do that. The lone danio is now swimming with the rosy barbs.