Just a very simple floating fish feeding ring. The idea is simply that the fish food does not get dispersed all over the surface (of the aquarium, pond, or - as in our case - fountain).
BTW, the floating water lilies (and leaves) in the background are from
https://www.thingiverse.com/thing:4364395
Enjoy!
Fish_Feeder_80mm.stl | 169.6KB |