Quote:
Originally Posted by PoonTang
The UV will kill anything that is under the light. Fish will eventually be blinded not to mention the harm to you. Think about it...you can sterilize tank water with a 9W UV sterilizer, think what a 400W bulb will do to a tank. Also, just some regular old piece of glass wont do.
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Are you refering to DE bulbs or blocking UV from SE bulbs, as Dana talked about?