I removed my Betta, BluRay, from his little 1 gallon acrylic tank into a 10 gallon tank and now he stays hidden behind the filtration system. When I turn on the light he sees his reflection in the glass and thinks that he's being attacked by another Betta from the reflection in the glass. BluRay usually hangs out at the front of the aquarium and is very sociable, but now I can't get him to move from the back of the tank. I tried to feed him, as well, and he was not interested. What do I do?