Just put my first 5 juvenile peacocks in new 75 gallon about 3 days ago. Tank is fully cycled, 0 ammonia, 0 nitrites and <10 ppm nitrates, ph around 7.8 and temp @ 80. They are all around 1.5-2 in ( little guys) and eating well but in between feeding they constantly swim up and down the corners of the tank in a group. Is this normal???