New Goldfish Lying at Bottom of Pond: Acclimation Shock and Proper Introduction

New Goldfish Lying at Bottom of Pond: Acclimation Shock and Proper Introduction

Newly purchased goldfish placed in a 50-gallon garden pond with filter and fountain initially responded but now lie at the bottom, moving only when nudged. This is the second batch to fail. Water tested "very good" by pet store.

Cause: Temperature and Chemical Shock

Pet store fish are acclimated to indoor, stable conditions. Sudden exposure to outdoor temperature, pH, light, and water chemistry causes severe stress, often fatal.

Proper Acclimation Procedure

1. Float the sealed bag in the pond for 1-2 hours to equalize temperature.
2. Gradually add pond water to the bag over 30-60 minutes.
3. Release fish gently; avoid nets if possible.
4. Do not feed for 24 hours; keep lights low.
5. Expect reduced activity for 1-2 days.

Additional Tips

• Buy from reputable dealers who quarantine.
• Quarantine new fish 2-4 weeks if possible.
• Ensure pond is cycled and stable before adding fish.

With proper acclimation, survival rates improve dramatically.