Ha, I like the idea that your Koi thought, Bugger this, it's boring and a bit lonely down here.
I was gonna put my theory of your experiences in my last post but it was already quite long with the quoting and picture and what not, so I'll do it
now.
This is to be read with a hint of humour, rather than someone just saying 'this is totally what is happening, it can't be anything else, I refuse to
believe!'
Soo...hmm...how to write without rambling (God I've started already!)
What if it is a parellel dimension, and in the other dimension YOU have already found out about this reality. It would explain hearing your voice and
stuff like that, and stuff being moved when you were the only person who knew where it was. It's you doing it!
You are the only person who knows how much of an 'experience' you can stand at a time - if you one day just saw a ghost it would quite likely make
you poop your pants, whereas if it had been doing smaller things for a long time that built up and built up until you saw it, it wouldn't be quite so
scary. If you know what I mean.
So, in the other dimension, Other You knows about this dimension, and is giving you little clues at a rate you can comprehend. That way, one day you
can meet yourself and have yourself over for dinner and it wont bother anyone

It's all along the thought of, if you could go back in time and
communicate with yourself, would you give yourself information about the future? That was just a thought I had when I was posting that link about the
fire, and reading about that sound that you couldn't replicate, until 2 years later when you got marble floors. Things like that.
Anyway, it sounds silly even to me, so as I said, pinch of humour