I'm concerned about the recent behavior of the little Delta male I bought last June. Within the last few days he's taken to 'shivering' (the only way I can describe it) while floating both upright and, occasionally, on his side.
He zooms from place to place instead of swimming calmly as he used to. Then he hides or sits motionless on the bottom or on plant. And he is unnaturally skittish and nervous, a trait he has never shown in the past.
Sometimes he breaths heavily, mostly normaL. He still eats, but reluctantly.
He has always had a small white imperfection above his right eye. It seems to have grown larger.
He's alone in a bare-bottom 2.5gal unfiltered at 80* with lots of plants and a hide. Water gets changed 50%/90%every two or three days with Prime. He'll only eat frozen bloodworms. Water checks out 0,0,0 and 7.8Ph.
He's never been sick before. Although, he's never regrown the finnage he bit off several months ago.
I haven't attempted any treatment because I can't seem to find a description in the stickies that applies.
Thank you for your consideration.