Sorry to hear about your fish, it's happened to us before. Definitely follow the instructions from the other members. I'd consider doing a PWC
right away, at least 50% .. if you haven't already.
In addition, how big is the tank, and what type of filter are your running?
That information is important so we can help you further.
Oh ... and whatever Petsmart / Petco tells you, do the opposite ... literally. Or better yet, come to AA first. Many many years of knowledge,experience and expertise available to your here.
Keep us posted!
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.