Nothing like spotting a potential emergency outside when you first wake up…

I look out and all our koi are out swimming. This can be very bad. We lost Rukia to hypothermia, and random swimming is a symptom.

I got online and googled "koi premature waking", "koi wintering", and half a dozen other phrases and finally got one article that hinted they do sometimes get a little more active during a warmup, and still pointing out if certain bad co2 situations got started they could go up seeking oxygen.

Well…I ran out and tested water temp—42 degrees—incidentally scaring all ...