Introduction  |  Aquarium Choices & Considerations Filtration  |  Filter Systems |  Filter Media Temperature Control |  Lighting Creating the Aquatic Environment Aquarium Decorative Features and Characteristics Water  |  Live Plants  |  CO2 In The Aquarium Introducing Fish  |  Fish Care  |  Feeding Aquarium Maintenance  |  Basic Maintenance Guide   Most plants require approximately 12 hours per day of light from a fluorescent fixture. Sudden changes in light may stress fish. When turning canopy lights on or off, it is beneficial to have room lights on for at least 30 minutes. Fish fed during the day should be allowed 30 minutes of light before and after feeding. Use timers when possible. Plants and fish will respond better to consistent lighting periods. Plants and fish will adapt to gradual light changes. When changing bulbs in a multiple bulb installation, stagger them 1 to 2 weeks apart. A remote ballast should be mounted in an area where there is adequate ventilation to efficiently dissipate heat. This is especially important in ballast types that generate more heat. Electrical wiring leading to the ballast should always incorporate a drip loop. Consider a GFI (Ground Fault Interrupter) power bar as an inexpensive insurance to avoid unpleasant circumstancessurrounding any potential electrical mishaps. Do not leave lights on 24 hours a day. As in nature, fish and plants require dark periods as well.