When I first got my angelfish, it had a nice opaque black stripe running down its face (one on each side) and nice red eyes.
Now, they are all faded and the eyes are clear.
Could a powerhead be the culprit? The angelfish is flapping its fins at a normal rate even with the powerhead running, so I don't think it's straining against the flow.
water params are all normal. No ammonia no nitrates/nitrites etc.etc. (had it tested today at a lfs)
feeding habits are normal but the feces is varying in color and seems to be always pooping...
one more thing. when I turn the lights off, his black spots really come out and they appear on his skin from nowhere. the top of his head becomes blackish, his stripes (two on his head and two on his sides) become stronger and his fins become really really black.
thanks in advance!