u/Owlz3r0

Hey!

I have a 55g tank, lightly planted, cycled for roughly 3-4 weeks.

pH: 7.2

Nitrites: 0 ppm

Nitrates: 0 ppm

Ammonia: 0 ppm

Temp: 86⁰F

I have three juvenile discus, more are coming in the mail. They have only been in the tank for about a week.

Since yesterday, they have started to darken up.

I did a water change yesterday, so could that be the stressor?