So what they look like are 1/8th of an inch long,paper thin rectangular with rounded corners and a red/orange color. They don't seem to move but are everywhere. Have been showing up in my tank prior to the heating debacle. Any ideas?
Flatworms are super slow, but you can see them react (constrict) to light or high flow, they are not anything to get worried about, untill they get out of control, then they are an issue.