Pimafix makes my cherry barbs school

[Captain Stress]

I'm currently dosing Pimafix for a fungal growth on one of my platys. Immediately after I add 3 1/2 teaspoons of it to my tank (36 gal), my cherry barbs come out of their usual hiding place at the rear and start schooling with my harlequin rasboras back and forth across the front of the bow front. It is the weirdest thing. I have done four daily doses now and they have done it each time for a few minutes. I don't see this behavior any other time.

Has anyone else seen a similar behavior with meds? Maybe they like the smell?!