It MUST be used with a glass or Plexiglas top. Never suspend this unit over open water, because it will cause mineral build-up on the LED lights. This unit is made to sit on the top of the hood, not to be extended over the open tank. The directions that come with it stress this.
answered 11 months ago
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Either will work. Mine is on a glass top and looks really good with plenty of coverage.
answered 2 years, 7 months ago
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Absolutely use over the glass top, never directly over water without protection from the moisture.
answered 2 years, 9 months ago
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To answer your question directly, it can be used with a glass top. The glass won't stop any beneficial light.
When it comes to an aquarium, I always put a hood on my tank. The only aquatic animal that can't escape by jumping is a sea horse.
Anytime you have turbulence in water, there's a chance of splashing. If you choose to put this fixture above your tank without a hood, water will more than likely get onto the light. After enough cool water evaporates on a hot light, there's a chance of the light bulb cracking or shattering and getting glass in your aquarium.
Since LEDs burn much cooler, they wont shatter from cooler water, but the mineral deposits left from water evaporating will be enough to cause the light bulb to burn out prematurely or possibly break.
answered 3 years, 1 month ago
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