“Meat” Fries

Must one wait 6 hours after eating fries from a meat restaurant or does this ש״ך (or another reason) exonerate one from waiting in such a case?

Mikveh

Have a question.   I am about to construct another mikvah..   I don’t want it to be as labor intensive as the first one…   Can a pool liner be used? Or is it considered a Keli?   I struggle with that because it’s a piece of...