Someone was showing me something similar on their facebook a long time ago, think it was an indoor setup, not a Koi pond...
Been wanting to do something similar for a while now, wouldn't be too expensive, can probably do it with some dense plexi found at the hardware store.
[–] Teflon-jersey 1 point 2 points 3 points (+3|-1) ago
Reposted 10 days ago. https://voat.co/v/gifs/1550816
[–] Bill_Murrays_Sandals 0 points 2 points 2 points (+2|-0) ago
Those little fish brains must've been trippin' balls!
[–] dirt-reynolds ago
That's one of the coolest things I've seen in a while.