Introducing your newly acquired fish into your pond involves much more than just ripping open the plastic bag which they were transported home in, and pouring the fish into the pond. If this is done you are soon likely to regret it. (Trust me.. I tried..haha..)
Fish should NOT be carried home in an unwrapped plastic bag.This will add to the level of stress already induced by the fish being netted and placed into the plastic bag.
You should cover the plastic bag with newspaper, paper bag or an insulated polystyrene box. This will help enormously in settling the fish down.
When you arrive home you should follow the steps indicated below.
1. Float sealed bag for about 20 minutes
2. Open bag and add some pond water to bag
3. Refloat opened bag for another 20 minutes
4. Release fish