What is the cause for a goldfish to have Ick disease one week and the next to have the torn fin...

disease? I did recently add a tropical fish to the aquarium . Shortly after the addition my gold fish had the white spots . Finished treatment , now one week later Ghost the goldfish has torn fins. Huumm ? Is it something I should or shouldn't be doing ? Oh and the tropical fish died. Thanks, Jewelslight

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poetvix says

6 years ago
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Rotem says

5 years ago
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