I think the arowana dosent like bright lights because during the day he goes behind the log and behind the plants and sits there relaxing.... Comes out when i come home from work to feed him and then i guess swims on top all night when the lights are off..... Is this normal?
Mine in a planted tank does it too. And so did my previous arowana in planted tank.
Aros is a top surface swimmer so if the light only few inches from it then it won't like it, dimmer light would be better for them or raise the distance of your light to your tank up but again this might effect your live plants.
Hmmm... my current one was swimming all day previously. Only recently did it go rest during lights on. It would come out and swim about all night once the sun sets, but the lights are still on. There has been no change to the lighting except to remove the "noon" of 4 rows of T5s to just 2 rows throughout. I'll continue to observe.
The day time resting behaviour also coincided with me removing some plants that was partially covering the opening of a "cave" below some wood. That said, those plants never really restricted him entering or exiting the area. It frequently swam through that space before. It is wide open from the other side as well. Those plants were not in a position to prevent it from resting where it is resting now.
