Does a small amount of Najasah render a pig pool Najis?

Q: We have a swimming pool at home, but some Najasah (ritual impurity) fell into it. It was a small amount, only filling a teacup. The swimming pool is twelve meters. Would its water be Najis (ritually impure) and should not be used for swimming? Please advise, may Allah reward you with the best.

A: Water is judged to be Najis if its color, taste, or smell changes due to Najasah. (Part No. 4; Page No. 25) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family and Companions.