I've never encountered this disease before. Ammonia 0, Nitrite 0, Nitrates 0, Temp 72F My marble molly is the only fish exhibiting the dropsy symptoms but one of my platies is also ill. My platy seems to be exhibiting clamped fins and just kind of floating at the top. She isn't floating on her side or in any abnormal way though. The molly has the "pine cone" effect with the fins and is rocking back and forth on the bottom on the tank while attempting to swim. Should I quarantine them? Other fish are acting normal. Please help..