I was out all day and came home very late last night. I turned on the lights to find my betta boy with a zoned-out look in his eyes, sitting on the filter intake, completely motionless. I know that he sleeps there every night, and he tends to lose a lot of colouration at night, but what happened next nearly gave me a heart attack. I waved my finger in front of his face, then he began to zoom around the tank erratically, swimming oddly at the surface, and getting blown around by the filter current. He seemed to be having trouble balancing and was as pale as a ghost, with massive stress stripes. He looked slightly better within an hour, then I fell asleep.
I really didn't expect to see him alive this morning...but lo and behold, he looks completely normal now. The colour is back in his fishy cheeks and he's exploring as I speak. No signs of disease or bloating. No stress stripes. Temp is at a balmy 26.5 degrees Celsius in his aquarium. It's as if nothing happened last night.
So, should I be worried about this little episode? (I did do a water change yesterday morning, 100%). Or did I just wake him up too suddenly and give him the fright of his life?