Watering soil without ants nesting in it

[Zeroten]

I have a lasius ant colony living in a terrarium with some plants and a ytong underground and a layer of soil above. I want the ants to live in the ytong nest I custom-made, so I can see their activity underground. But there are also plants in the terrarium which I need to water. How do I prevent the ants from nesting in the soil, and still be able to water my plants.

Thanks for helping.

[TheRealAntMan]

You probably won't be able to. Your ants will likely prefer the soil soil rather than the restrictions of the y-tong nest

[Zeroten]

You probably won't be able to. Your ants will likely prefer the soil soil rather than the restrictions of the y-tong nest

Is there no way to make the soil less attractive for the ants, or to make the ytong nest more suitable for them?