Hahahaha oh college.......
But yes....Assuming i did the cupramine treatments right (I don't think i screwed that up) then ich had to be introduced via the frags. As part of the life cycle, the cysts breaks off, anchors to something (possibly the frag plug) and germanates for a while......hatches.....free swimmers hit the water column......have about 2 days to find a fish yada yada yada.
So I see the door i left open but man.........i don't think i'll ever be able to close that door.
Think I'm best just keeping fish with a better defense system.