Always remove carbon before medacationg a tank. You should also wate at least a half hour after adding any declor to the water. This last part is especially true if your using any dyes like MB or MG.
Thank you, doing this on the internet isn't always easy. I sometimes stress over members fishies more than my own. Plus I'm always aware that any help I try to give is out there in the open for the world to see, right or wrong.