How to Encourage Fish to Stop Hiding
Hiding is natural, especially in new tanks or when fish feel stressed. It is not always desirable or possible to stop it completely.
Fish hide because of new environments, lack of hiding places, intimidating tankmates, disease, poor water quality, or bright lights.
To help them feel secure, provide plants, caves, rocks, and driftwood; dim the lights; feed regularly; maintain excellent water quality; introduce new fish slowly; and observe behavior for signs of problems.
If fish constantly hide and show stress symptoms, consult a veterinarian or experienced aquarist. Remember that some hiding is perfectly normal.