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mouth problems

  1. New Guppy with mouth issue[growth?], not eating. Diagnosis?

    Tropical Fish Diseases
    1. Size of tank? 10 gallons 2. Water parameters a. Ammonia? 0 b. Nitrite? 0 c. Nitrate? 10ppm d. pH, KH and GH? ph: 7, kh and gh, not sure, waiting for answer e. Test kit? API Master kit 3. Temperature? 77 4. FW (fresh water) or BW (brackish)? Freshwater 5. How long the aquarium has...