i just saw a white thing on one of my dwarf angelfish last night. This morning it is gone but there is a spot of discoloration where I saw the thing. These fish are already in QT so can I dose copper and Prazipro general cure melafix? Also, if it is flat worms will that effect my corals that are in my coral invert QT because these angels were in the same water as some of the corals.