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Old 05-04-2011, 11:24 PM   #1
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Question glass cover with light fixture?

im curious do you need a glass cover on your tank, when u have a light fixture like this? Current 36" Nova Extreme 2x39w T5 HO Light Fixture*::*T5 Flourescent - Current Nova Extreme T5 Light Fixtures*::*Lighting*::*Aquarium Supplies*::*Something Fishy Can i just let the top bare?

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Old 05-05-2011, 12:33 AM   #2
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I believe most people have baretops anyways to allow better gas exchange. I think I saw most tanks with those with baretop

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Old 05-05-2011, 12:43 AM   #3
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I don't have a glass cover on mine because it blocks some of the light from the fixture to the tank. Maybe one day I will have a canopy built for it, but until then, it seems to be doing fine without it.
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Old 05-05-2011, 08:41 AM   #4
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No glass tops. The gas exchange (O2/CO2) takes place at the surface. Tops can interfere with that causing a low pH condition.

Here's a good thread on that subject.

Cover over aquarium? Yes / No
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Old 05-05-2011, 01:54 PM   #5
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What if the covers have the openings in the back of them for the cords and equipment will that still be an issue with the gas exchange? Some are about 1 1/2" or 2" open space in the back...
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Old 05-05-2011, 02:13 PM   #6
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I run open lid on only one of salt tanks. :-( The lights I have on the others makes it necessary for me to have the glass canopy. i do leave the whole back open without the plastic insert. I luckily don't have any jumpers lol

180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.
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