Questions:
What melacha of Shabbos is a person violating when rinsing old salted fish and Spanish mackerel?
Is it permitted to rinse old salted fish and Spanish mackerel with cold water to help make it edible?
We learnt the פרי מגדים אשל אברהם ס”ק טז & לבוש ס’ שי”ח סע’ ד who says it is prohibited as it is considered מכה בפטיש
https://hebrewbooks.org/pdfpager.aspx?req=9223&st=&pgnum=54
https://hebrewbooks.org/pdfpager.aspx?req=41248&st=&pgnum=203
https://hebrewbooks.org/pdfpager.aspx?req=14325&st=&pgnum=154
Review משנה ברורה ס’ שי”ח ס”ק לז and ביאור הלכה “והדחתן and see the proofs he brings that there is no מכה בפטיש on food.
https://hebrewbooks.org/pdfpager.aspx?req=60388&st=&pgnum=274
Bring a proof from Rashi
Learn תוס’ דף לט. “כל