If not level the stand first before you fill the aquarium with water. You should never attempt to move an aquarium with any amount of water in it. Selecting the Aquarium Things to keep in mind when selecting an aquarium is the size of the location, the type of fish you may want to keep and of course the size of your pocket book. Keep in mind that the larger the aquarium the easier it will be to maintain and the healthier the fish will be. Selecting a Cover and Light Your aquarium needs light, preferably artificial light.
Fluorescent lighting is preferred over that of incandescent.
The fluorescent light brings more of the color out of the fish as well as plants. Fluorescent lighting will be more expensive to start with but it will be more economical over a period of time. A cover is very necessary to help keep the fish from jumping out, to reduce the amount of evaporation, and to keep unwanted pollutants from entering into the water. Aeration All living things require oxygen even in your aquarium. The bacteria that breaks down fish waste needs oxygen.