Hi. I thought my fish had internal parasites, because he was thin and had stringy white feces. I was already going to buy him his meds, but before I noticed that him pooping. His feces were normal on the far edge, and seemed a bit as if he was contasipated, but on the edge near him they were stringy. I noticed him poop again today (a day after) and it is the same - normal feces on one side (not contasipated) and stringy on the other side. What does that mean?
EDIT: He's also getting fatter lately..