Both my flameback and multicolor angel have long (maybe stringy not sure) poop. I have some pictures and a video but I’m not sure what to do. My flameback has been in quarantine due to being the most aggressive fosh ever but my multicolor in my main tank has the same kind of long/stringy poop. Is it something I have to worry about like a worm or internal parasite? They are both so active and eat better than all my fish but this long poop is a consistent thing for them everyday. Is this an angel thing, sorry for the dumb question.