5.5 gallon planted tank with 1 male rainbow platy and 1 female swordtail. Tank is about 2-3 months old. have had platy 2-3 months and the swordtail about 2 weeks. I feed them flakes. The swordtail is rail thin with long, stringy white poo, and has developed fuzzy white patches on her sides. treated tank with prazipro about a week ago, did a w/c and replaced carbon a couple of days ago. Removed carbon and repeated treatment today. The swordtail is looking worse, even thinner etc. I have mixed some treated tank water with a tiny bit extra prazipro and am soaking some flakes in it to try to feed her. Any advice? Anyone have experience treating flakes with prazipro?