last night i turned off all the lights in my room, and went to sleep. but in the middle of the night, i got up to go to the bathroom, and turned on my room light. all the fish except my betta were on the bottom looking discolored and not moving (the betta was in the same condition on the top) so i panicked and turned on the aquarium light to see better. one by one they got their collor back and started moving. where those little buggers sleeping? 