1. Some people go by the ìinch of fish, gallon of waterî rule when deciding on how large of an aquarium to buy.† This is a completely false and bad method to go by, you should always check your individual fishís tank requirements.
2. Make sure you ask plenty of questions when you are buying accessories or fish for your aquarium.† The salespeople are there to help you, and should be able to handle any concerns you have when buying items for your aquarium.
3. It is not considered a good idea to keep aggressive fish with fish of other temperaments.† You should keep peaceful fish in an aquarium with other peaceful fish to avoid any sort of fighting between the fish.† Aggressive fish should only be kept with other aggressive fish.