Can you put a cork as fish toy?

It is not recommended to use a cork as a fish toy. Corks are not a natural part of a fish's environment, and they can be harmful if swallowed. Corks can also be a choking hazard, especially for smaller fish.

There are many other safe and appropriate toys that you can use for your fish. Some good options include:

* Aquarium plants

* Driftwood

* Balls or other small objects made of smooth, non-toxic materials

* Toys designed specifically for fish

It is important to choose toys that are appropriate for the size and species of your fish. You should also make sure that the toys are clean and free of sharp edges or other hazards.