Visiting an lfs today I was very pleased to hear the staff at the counter refusing to sell an ignorant customer a goldfish.
The staff asked the customer if they had a filtered tank and when they said no - just a bowl, the staff informed them that they would be unable to buy any fish here.
The staff asked the customer if they had a filtered tank and when they said no - just a bowl, the staff informed them that they would be unable to buy any fish here.