Fish don't like surprises. They do not react well to rapid changes in temperature, handling or rapid movements. Always make sure you handle them gently and allow them sufficient time to get used to new surroundings.
The best way to introduce fish into your tank is as follows:
- Add a full dose of Fluval Aqua Plus (or a similar product) to the aquarium. Turn off the aquarium lights during acclimatisation.
- Float the bag containing the fish in the aquarium for approximately 20 minutes to equalise the water temperature.
- Open the bag and add a little aquarium water - approximately one third of the bag's volume.
- Wait 20 minutes and repeat the process.
- Carefully remove the fish with your net and place them in the aquarium. Leave a minimum of 6 hours before turning the lights on.
If these are the first fish in the aquarium, wait a full 48 hours before feeding.