Convert towel radiator to electric or disconnect it

Hello,
after living in the house (new building) for some time now, I am currently dealing with the heating.
Among other things, we have a towel radiator (towel radiator) with a central connection that also runs through the underfloor heating. I now know that this is suboptimal.
What has prompted me to take action soon is the fact that the water in the tubes in the HKV is really yellow to brownish, which I attribute to rust on the towel radiator.

The question now is, what to do?
Two options come to mind:
- Switch to electric if possible. I have a power outlet right next to the towel radiator. Does this work with every towel radiator? I don’t know which model/manufacturer is installed. Is this doable for a layperson? Unfortunately, I have no knowledge of the matter.
So, an electric heating element or a completely new towel radiator.
- Disconnect the towel radiator so that it no longer runs through the underfloor heating and is only "decoration." What do I have to do for that? Simply turn it off at the connection with pliers?

What do you think?

It's basically quite simple.

Is the towel radiator completely separate on its own heating circuit? If yes, then close it at the manifold. Both supply and return of this heating circuit.

Disconnect the middle connection. Remove the towel radiator from the wall and turn it around.

Screw in the suitable cartridge. Observe the torque. Fill with the appropriate fluid. Close the hole with the matching plug.

Check if both are tight.

Put the radiator back on the wall. Close and seal the middle connection coming from the wall/floor.

... unfortunately the glass balls are currently sold out ;) ;) .. you yourself cannot say anything about the type of your radiator, it would be helpful if you could take a photo of the connection situation of your radiator. Then someone here can surely give you more useful tips.

Towel radiators and bathroom are connected to one heating circuit. Here are two pictures. Sorry, I thought that the information did not require pictures.

You definitely need closures for the middle connection of the towel radiator as well or a completely new one.

The pipes coming out of the wall also need to be connected together again so that a circuit is formed, because we do not know whether they are parallel or in series on the bathroom heating circuit.

Such a towel radiator can also be operated with an additional electric heating element without separating it from the supply and return flow of the heating circuit. With a timer, the electric element can then be activated at the desired times. If you want to separate it specifically because of the rusty water, the medium must not come into contact with iron anywhere in the entire heating circuit. This already starts with the circulation pump.