I have a 150g tank with 26 haps and peacocks male. About a couple of months ago, my lwanda would stay at the corner of the tank (seems to be hanging out higher and higher in the corner) in a slight diaganol direction upwards and just hang out there all day. If i get close enough, itll then swim around with the rest of the fish. But as soon as I leave, it goes back there to hang out. During evening, it would then swim with the rest of the fish. He eats and poops normally. Water is good, nitrates low, no ammonia. A little worried about him but everything else seems normal. Any ideas?