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bloody fins

  1. Betta Fish Diseases and Emergencies
    Hi! I've had my doubletail betta for about 6 months now in a 5.5 gallon fluval tank with a filter, heater (set to 80-82°), live plants and two nerite snails. Around two months ago, I foolishly tried to keep 3 tetras in the tank with him. 2 of them died the night I introduced them but one...