emperor tetra - aggressive?? and sick??

hi guys

I know i should have more, but i have two emperor tetra and had them for a while!! and they have been awesome!

The female one looks ill! i want to say a light loss in colour but its much of a muchness !! but in her behavior, like she keeping still and at an angle, and just does not look happy! its almost looks like she is about to die!

then the male is freaking out !! swimming everywhere chasing all the other fish!! including the female !! all my other fish are hiding in the plants while he does his thing :O

dont know what to do?? but he is very aggressive all of a sudden

 

Got back home and she is back to normal !!! WEIRD!!!! 1 hour of complete bleakness with those two!!