Safety is an important consideration for any aquarium lighting system, only in part because of the potentially deadly combination of water and high voltages. One must pay attention to other important safeguards. Never look directly at the filament of a metal halide lamp; all produce at least some UV radiation, which can damage the eyes. Locate the lighting transformer, or "ballast," in an area where it will be well ventilated — all lamp ballasts produce heat — and protect it (and all other electrical equipment around the aquarium) from contact with seawater. Never place a ballast on the floor of an aquarium cabinet where it can be reached by spilled water. If there is a spill near the ballast, disconnect the power before cleaning up. Finally, suspend metal halide lamps sufficiently high above the water to provide ample room to work on the tank without bumping into the light fixtures (they're hot!) and make sure the fixtures are securely mounted and ventilated. Keep the acrylic UV shield provided with your light hood or pendant in place to prevent the hot bulb from being splattered by cool water; metal halides can and do explode on occasion.

The COMPLETE guide to Aquariums

The COMPLETE guide to Aquariums

The word aquarium originates from the ancient Latin language, aqua meaning water and the suffix rium meaning place or building. Aquariums are beautiful and look good anywhere! Home aquariums are becoming more and more popular, it is a hobby that many people are flocking too and fish shops are on the rise. Fish are generally easy to keep although do they need quite a bit of attention. Puppies and kittens were the typical pet but now fish are becoming more and more frequent in house holds. In recent years fish shops have noticed a great increase in the rise of people wanting to purchase aquariums and fish, the boom has been great for local shops as the fish industry hasnt been such a great industry before now.

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