Remove the figure eight as soon as possible (I think you are but just to make sure) and then buy a dimmier or dim light for the room, a red light is usually good, and put the lights on dim and then enjoy watching him eat bloodworm. You could also buy another nocturnal species that is quite active to tempt him out, any suggestions on this? Maybe a type of Dwarf Catfish or Synodontis (Upsidedown Catfish), maybe a Spiny Eel or another fish that is semi nocturnal and will eat in dim light or daylight to tempt him out like danios or a Ruby Shark or a Red Torpedo or even Livebearers like Swordtails and then he will eat the fry as well.