Soon after I got the cherry into the tank.
Now...over maybe 3? days from fine to this
I did have an ammonia spike to 2-3ppm due to some dying fish(pretty sure at least) but I did a massive water change and brought it back down.
Saw this and did a double check ammonia and nitrite are fine and nitrate can't be nasty yet because the water change was just a few days ago.
Is it the spike? or something else
the white patch in the color loss "saddle" isn't a fleck in the camera...and it has an even smaller fleck of grayish black inside that.
Suggestions? Should I split them up between the 55 and the 30 to lessen the ammonia production and reintroduce them slower? (did buy 10 orange von rios and put them all in the 55 at the same time)