Hi,

I think my pond got raided by an otto, I haven't seen it, but half my fish are missing.

My largest koi had one of its fins ripped out, it seems to be swimming fine, but I am worried about a bacteria infection. Water is only 50 degrees and not warm enough for it to heal. Should I risk leaving it in the pond and not stress it, or should I try bring it inside and try warm up the water. I have never had much luck in nursing koi, I am thinking this will likely stress it further ?

Thanks