When installing the new tank in your home, choose a firm, level, and smooth surface because a even a 20 gallon tank when full of water can weigh over 200 lb. Placing the tank in uneven surface can cause stress in the glass and the tank may break. HOOD Hood prevents fish from jumping out of water and reduces the amount of water evaporation. Without a hood, you may have to keep adding water to the tank to make up for the evaporated water. The room may become very humid, too.
Fluorescent lights are better because it is cooler and consumes less electricity.
Incandescent can over heat the water temperature and kill the fish. If you want to grow aquatic plant, you need more light and need to consider wavelength of light. Please come and talk to Pet Forum staff when selecting appropriate light for your tank especially if you have aquatic plants. Remember to turn off the light at night because fish get tired if you leave the light on. Most heaters have built in thermostat to keep the temperature stable which is essential for the health of your fish.