תלמוד על מכשירין 6:3

In the opinion of Rebbi Nathan, Rebbi Meїr, Rebbi Eliezer ben Jacob, and Rebbi Eliezer, all three said the same. Rebbi Meїr, for he says³⁸It seems that this refers to the anonymous Mishnah Miqwa’ot 7:2, presumed to be R. Meїr’s teaching, which states that if a miqweh is short one half seah of the required 40 seah of water (cf. Chapter 4, Note 112, Chapter 19, Note 139), if one half of a seah of fruit juice fell in, the status of the miqweh is not changed. If the character of fruit juice could be disregarded (being less than 1 in 60 of the total amount), then the watered down fruit juice could make up the difference., “fruit juice never is disregarded.” Rebbi Eliezer ben Jacob as we have stated³⁹Mishnah Makhširin 6:3. Usually, fish sauce is impure since fish, coming out of the water, is always prepared for impurity (Demay, Chapter 2, Note 141.) If it is known that the fish sauce was extracted from pure fish by people strictly keeping the laws of purity, then the fish sauce is pure and, since it is not one of the “seven fluids” (Note 26), cannot become impure. But if any amount of water is added, it is prepared for impurity.: “Pure fish sauce into which fell the smallest amount of water is impure.” And Rebbi Eliezer here.