1. It is a good idea to keep carbon on hand in case of emergencies. Carbon can be used to soak up anything harmful that may be introduced into your aquarium. So keeping an emergency stock can be a life saver.
2. Goldfish can live incredibly long periods of up to 25 years. You should plan accordingly when you purchase a goldfish.
3. When you are picking out fish for your aquarium, you should always pick the best specimens available to put in your aquarium.