HeLp!!

[rubadub]

so earlier today i did a waterchange in my tank and one of my sharks lost all his color

he went from having his top black and his lower silver to being all silver
here is a pic of what he looks like in comparison to his tankmate

Any Idea on what could be causing this?

 

[rubadub]

Water Parameters are fine
Amonia 0ppm
Nitrite 0ppm
and Nitrate is currently at 5ppm
ph is 7.2

 

[Chicklette]

Did you add water conditoner? How much did you change?

 

[rubadub]

50% of the water was changed
and i always add conditioner when doing water changes

 

[rubadub]

i usually always do 50% waterchanges and this is the first time he's changed colors
he almost looks albino all of a sudden