Hello! A friend of mine sent me this video: daten-transport.de . She has 2 young discus fish with infected gills, a third young discus has died suddenly. Could it have anything to do with the white worm in the vid? What is it? The video can be watched/will exist for about 6 days. One has to click the above link and then on "vid_20180614_170105.mp4" Many thanks in advance!