Question:
May one be in the same swimming pool as his wife (dressed modestly) when she is niddah? Sometimes the husband and wife need to take care of the children within the same pool.
Answer:
The fact that they are in the same swimming pool is not a problem, as long as they are not too close to each other that they can feel each other’s movements. However I understand your question that they are not going swimming together, (something that would be kalus rosh) but they happen to be in the same pool in order to take care of their children.