Hello all I've noticed my female guppies are acting strange and scraping their gills/sides of bodies on the sand. Like they are flashing the sand. I have two videos, and two females flash the sand but I don't know how to upload videos. They are doing it off leaves too. I saw one of my Minnows do it a few weeks ago but none of them have done it since. Is this a sign of Gill files or parasites or something?? Please help!