yellow damsel turning dark,is it normal??

[sruiz]

I have put two damsels in my tank for three days. I have a blue with yellow tail, and a yellow damsel. This morning I noticed the yellow damsel was turning dark,almost kind of blackish. Are they suppoused to change color?
My blue damsel is acting fine and is swiming all over the place. And I have noticed the yellow was not even eating much after the first day, he mostly sits at the bottom and hides in the rock. But I don't understand why he is getting dark. The yellow fish is even bigger than the blue fish.
Can someone please give me an answer.

 

[Blown 346]

If the lights just came on then it is normal for fish to become either darker or look pale. I had a yellow tail that became a darker hue as it got older.

 

[murezor]

I have 7 Blue Damsels that change to a dark blue (almost black) when they are stressed.

My guess would something is causing them stress. What are your water parameters?

 

[sruiz]

I actually just put more live rock in the tank. And it was semi-cured. Is that the reason they are under stress. I will test my water as soon as I get home.
thanks,

 

[PatMayo]

It well could be. I would monitor ammonia and nitrite and do larger than normal water changes until all levels are zero.

Regards,

Pat

 

[sruiz]

Pat,
the truth is my tank has not even gone thru one cycle. I know I should have probably waited but the fish are going thru my first cylce.
I know I shouldn't have put the fish in there but the LFS won't take them back. I just hope they survive.
But my guess is I don't want change water since it is going thru the fist cycle right??