Silver Dollar losing black bar color

[aeri]

One of my black bar silver dollars (emperor blue hook) has been occasionally losing its black bar over the last couple weeks.

This is a pic of them last week:


And right now:



What does this mean? Is he stressed? The water params are ok and they are eating.

 

[tlindsey]

One of my black bar silver dollars (emperor blue hook) has been occasionally losing its black bar over the last couple weeks.

This is a pic of them last week:
View attachment 1347229

And right now:
View attachment 1347233

View attachment 1347231
What does this mean? Is he stressed? The water params are ok and they are eating.

One of my black bar silver dollars (emperor blue hook) has been occasionally losing its black bar over the last couple weeks.

This is a pic of them last week:
View attachment 1347229

And right now:
View attachment 1347233

View attachment 1347231
What does this mean? Is he stressed? The water params are ok and they are eating.

Probably the less dominant one or stress.

 

[Allan01230]

I would still do 50% water change butsee if the other one is picking on him, Dollars are better kept in schools of at least 6 or better 1 to avoid this I have a large solo black barr that schools with my silver distochodus (3) for yers and his color is fine other occupants are 4 adult rainbows in an 85 gallon

 

[aeri]

Thanks, maybe I should pick up some more...