ok here's the situation, 2 weeks ago i saw my aro hiding beneath the dw, thought it was chilling out or something so i didn't mind. 2 weeks later still doing the same thing so i asked my dad (the only person in the family inclined in keeping fish) if he had fed anything unusual to that particular aro why it acts that way, he said none but instead told me that while he was cleaning the glass from the outside it spooked my green aro and slammed to the glass pretty hard. couldn't argue with him because his temper is pretty high. lol. anyways, i observed it and it does swim normally actively only that it does it at lights out or at total darkness. spends it time like a normal aro does only at dark. it eats only at lights out. anything i could do to turn it to normal again? it does eat. it does swim, and even chases some tank mates only on dim to total dark settings.
