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red streaks

  1. Red streaks on my goldfish fins? Treatment advice please?

    Koi and Goldfish
    Hi everyone! My six years old goldfish, a beautiful fantail, has been having tubercles on his gills (spawning, i have been told) and now he has long red streaks on his tail fins. I do 25% water change of my 30 gallons every three-four days and always Use Seachem Prime with water changes. He...