Should concrete be waterproofed or allow water to pass through?

A somewhat strange matter, but I am considering creating a kind of moat around the house. There is a very special reason for this: I want to breed food fish there. Now the question is whether I make the concrete waterproof so that the water doesn't get into the basement or just let the water pass through so that the basement stays nicely humid and I can grow mushrooms there. The question is: how much water will get into the basement, will I have to pump it out from time to time, or invest so much energy into pumping it out that it is not profitable? Then there is also the need to prevent the living space from becoming too humid. Complicated project, but perhaps someone here has ideas and suggestions about it.

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No no, everything is fine as it is. I would just make sure that you get one or two more holes in the roof frame.... You could still breed mice there perfectly well. How are you doing with an unreliable heating system?! To possibly breed viruses in winter; have you ever thought about that?

I specifically have the moat against intruders! If they then gnaw on the house wall or climb up, they will be poured over with hot tar! ;P I don’t really need heating, it will be a zero-energy house.

You can find it as funny as you want, the house experiment will be implemented as soon as the planning is good enough.

Regarding the water, I will probably have to talk to a physicist or an engineer. From what I have learned, not too much water should come through, but it would be necessary to calculate how many square meters of water act against the walls to get a more precise picture. Ice formation in the concrete is much worse, but should be preventable; I don’t think the house walls will reach 0 degrees, and if so, only directly at the water surface.

Who dries the walls on the ground floor? Water has the stupid habit of rising upwards!

Really sweet question...

Vertical sealing in the basement at ceiling height