Other fish in 160 or 180 ltr tank 11 tiger barbs (4 of which green), one crebanesis, one cockatoo, one keyhole, two yoyo loaches, three sword tails, 5 young silver sharks (2.5''), 2 cherry barbs, one pictus cat and 4 silver tip tetras.
Yes did check for abnormalaties but couldnt see any obvious...