Any benefit from malachite green dip after TTM and 2wk quarantine?

[pacificdiver]

I've had a new arrival Royal Gramma and a Red Firefish in QT for 2wks after TTM. I ran two courses of Prazipro during TTM, and both fish are free of any signs of disease.

My question is, is there any point to dipping in Malachite Green (or anything else), as a preventative, or am I just adding stress for no reason?

Thanks in advance.