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Brad yes you can reuse a compression fitting, buy a few new ferrules and the brass sleeves (these keep the plastic tubing from cutting when tightening).

I need further education. So I’ve seen where I can buy replacement sleeves and nuts, but haven’t seen ferrules.  I somehow assumed the ferrule was permanently attached to that side of the fitting.  Also, to clarify I assumed the ferrule is the part that fits inside the tube?

Speaking of replacement nuts, is there a need for them or are you generally fine using the same nut with a new sleeve?