I’ve had a clownfish for about 5 months and it has had a white stringy poo for a while, so my first response was to dose metroplex and prazipro until symptoms disappeared. After a week or so the symptoms disappeared so I stopped medicating the water. Shortly after that the symptoms came back and I decided to try the API general cure. I followed the instructions on the pack which suggest 2 doses and the clown still has the white strings. What else can I do? I don't know what else to try.