My guppy was living in a ten gallon tank with bout five other guppies, two of which were new and died two days after getting them. I think they must have had some sort of infectious illness (though they showed no signs of it), because I noticed my guppy hiding with a swelled abdomen. I immediately quarantined. Because my guppy had a really largely swelled abdomen and raised scales, I gave him some pea in case of constipation, but was convinced it was dropsy. The next day, he had an opening on the side of his stomach with a jelly-like sack still attached to him (picture one). I immediately started him on melafix. The day after the first melafix dose, he now has red stringy things coming out of his side (picture 2). Is it a parasite? What can I do?