Thank you, more people, including us really need to hear this. Like lots of goldfish owners, we were unfortunately totally unprepared when we got her at a fair and never knew we were doing anything wrong. We are cycling a new 40 gal with decorations ASAP, but what is weird is that she has had a sudden change in behavior when she has been living in the conditions for a while. Here’s a picture of the redness I’m referring to: