This appears every time even after I have done a water change. It dosen't move unless disturbed by the fish in which case it just floats back down to the bottom and I was wondering if it is anything to worry about?
yah it is i think an internal parasite, because i have a fish and it never grows a belly after i feed it. And i noticed that it "shi*" is white while the others are (red), all given the same food.