Observe and clear every new fish before it joins your display tank
Tank Name / Location:
Tank Size (gal):
Water Type (FW / SW / Brackish):
Date Started:
Filter / Turnover (gph):
Heater (watts):
Quarantine Log
Log each new arrival through its quarantine period so you only move healthy fish into your display tank.
Why quarantine
Quarantine every new fish for 2-4 weeks in a separate tank before adding it to your display.
This catches ich, velvet, internal parasites, and bacterial infections before they spread.
Watch for clamped fins, white spots, flashing (scratching), rapid gilling, and appetite loss.
Treat only what you observe; follow medication dosing and finish the full course.
Match QT water parameters to your main tank and keep it cycled (a seeded sponge filter helps).
New Fish / Species
Date In
Symptoms Observed
Treatment / Dose
Date Cleared / Out
Notes
Medications used and dates, water changes during treatment, behavior day to day, losses.
This is general aquarist guidance, not veterinary advice. For a sick or declining fish, consult a local fish store or an aquatic veterinarian, and never mix medications without checking compatibility.