Hello and welcome to the forums.
What are you feeding him. White or stringy poop can not only be an indication of parasites, but their poop represents their diet. If he's swimming and eating normally (also make sure he's not losing weight), just keep and eye on him to see if his condition changes.
What are you feeding him. White or stringy poop can not only be an indication of parasites, but their poop represents their diet. If he's swimming and eating normally (also make sure he's not losing weight), just keep and eye on him to see if his condition changes.