One of my cardinal Tetra has Dropsy and I can't get to the fish shop until tomorrow. I've separated him into a plastic jug but it still in the main tank. (he's hanging on the side) I've added a small dose of medicine that treats gill and body flukes. Hopefully that will do something for him. My main tank is currently being treated for parasites any way, i'm using flash metronidazole in a home made fish food. This is the fish in question will he survive the night?