1. You should always purchase the correct lighting setup for your aquarium.† Doing this will make the habitat much better for the fish and plants in your aquarium.
2. You should keep some brushes on hand, especially if you are a reef aquarium owner.† With your brushes you will be able to clean off any built up grime from inside your aquarium or on the surfaces of your hard corals.
3. You must always treat the water in the aquarium before attempting to place fish.† If you fail to treat the water the fish can die from the condition of the water.