Just for the last 2 days my pirahna have been really skittish like they will not come out unless my room is completely lightless. I always leave there tanks lights off, i did a huge water change like half an hour ago, and tested water params are all perfect. But when i turn my room lights on they freak out and run for cover. I even took the light out that was closest to their tank so its alot darker in my room with the light on, so any help would be great. Thank you