A few years ago I had a huge Turbo (golf ball sized) in a Biocube 14. For some reason the temp got up to about 84 or 85 and he just cut loose. The water looked like someone dumped a half a bottle of purple up in there. I did a partial water change to try to clear it up and it just kept coming (no pun intended). He finally stopped and everything cleared up eventually, no damage done.