The first thing I saw this morning when I looked into the tank was a very fuzzy piece of feces in a really obvious place (which means it wasn't there 24 hours ago or I would have seen it. So it looks like that might be the culprit. I don't know why there's suddenly that issue now, but at least I'm not crazy about mold growing in a day (and hopefully now people won't think I change their water only once a week I'm smarter than that). This frog likes to do all kinds of things that get my heart racing, so of course this frog would do something that makes me think 'Is that my frog dead?!'

I'm still going to do what you said Don. It's not well water but there's definitely a smell and I have no idea what the water here is like.