Just this one guppy for the past two days has had stringy poo hanging from it. Yesterday it was brown. This morning it was whitish and now it’s brown again. Does this seem like an infection? If so how do I treat? Do I treat the entire tank and is it something that could pass to my baby snails? There is a UV filter in the tank so hopefully it’s not spreading much. I’ve only had these guppies a couple of weeks. Also pic of the dumbo eating spinach for good measure.