Feeding ring for fishtank

this is my feeding ring for every fishtank. If you use a surface skimmer, the most part of the fishfood will go down in your filtre. this ring will protect the food for doing that!

I tryed 3 versions of holding clamps, the first one are problematic because it will leak water out of your tank.

I use the V3, which is adjust on the waterlevel. It works perfect at mine.

The V1 is for 6mm thick glas tank.

I put every clamp version 2 times in the 3mf. You have to delete the clamps you does not need.