You can definately try it and remove if you don't like it.

I have put them so the hose was running water out of the piece of cork flat or even round, and the water flowed down the cork and back into the substrate to collect and go back to the pump down in the drainage layer.
It worked fine but my pump started to humm after a while and was annoying in my bedroom since it was humming louder than the sound of the water running.

No reason not to try your idea or plan and like I said earlier, just make sure you can access it to clean/maintain when needed.