This will plug the feeding hole in a Fluval Flex to prevent things falling in or back out.

Dampens the noise of splashing water, and also keeps aerosols and other things out of your aquarium.
Any questions feel free to ask!
For the 34L Fluval Model.
This item is 3D printed and therefore can be in black, white, yellow or glow in the dark!
Tell me which colour you want when ordering otherwise black will be defaulted.
Any questions feel free to ask!
Thanks :)