Zebra Danios changing color, losing stripes

[squirrelrabbits]

Anyone ever had a danio whose color faded a bit, turning sort of golden? I have two who have faded, so that their stripes are not visible at all on their tails. I thought at first it was velvet, but now I think not. My nitrites are slightly elevated (.25). I also moved some of these to a new tank recently, with some loaches (none of whom bother the danios at all). Is it stress? Or is it related to breeding behavior perhaps?

 

[The-Wolf]

it could be stress, it could be that one of the danios grandparent/parent was a golden danio, but it could also be neon tetra disease,
which despite the name is not limited to neon tetras.

 

[Lynz781]

The only time I notice my danios go pale is if I havn't turned on the tank light for a while.