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Old 01-18-2012, 03:20 PM   #11
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Yea probably
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Old 01-18-2012, 03:20 PM   #12
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Originally Posted by Race3370 View Post
What kind of gas exchange?? I guess I have never heard of this. Any more information would be greatly appreciated!!
Having an open top gives your tank a lot more surface area between your water and the open air. This gives you better gas exchange between the water and air when compared to a closed glass lid. This is ultimately healthier for your tank as oxygen can be reintroduced to your tank and CO2 is released from your water.

However, with an open top, there is a chance for your fish to jump out etc. A good way around this is with a canopy, or like I suggested above, a screen mesh top.
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Old 01-18-2012, 03:22 PM   #13
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Here's a quick article on gas exchange:

Aquarium Aeration and Surface Agitation: Aquarium Fish: Animal Planet
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Old 01-19-2012, 02:14 PM   #14
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One other alternative that I think can give you a tighter fitting top for about $20 (up to a 48"x18" tank) is using light diffuser grating. You just use a paif of side cutting pliers to snip the pieces out you don't need. I did this with my 75 for fear of my flasher wrasse carpet surfing. I used white grating which costs about $20 per section at Home Depot. One section gave me just a little more than I needed. If you have it available, I think black would look less conspicuous. (If the topof my tank was a little higher, I wouldn't be able to see it at all.) There is also silver out there as well. It does cut down on some of the light penetration (moreso than the clear screening mentioned earlier), but it doesn't seem to be all that much to make a difference to my corals. Unlike the screen, the light diffuser can be cut into pretty much any shape whereas you're pretty limited to just rectangles with the window screen frames.
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Old 01-19-2012, 03:36 PM   #15
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That's another great idea
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Old 01-19-2012, 03:37 PM   #16
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I will probably do that
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Old 01-19-2012, 03:58 PM   #17
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Or... you can get some polypropelene netting and make a cover that does not restrict or shadow light like the ceiling grids/light diffuser panels and others do. I did onw and easily framed it with PVC quarter round, glues and stainless steel screws. Got plenty available for shipping.
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Old 01-19-2012, 04:02 PM   #18
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Or... you can get some polypropelene netting and make a cover that does not restrict or shadow light like the ceiling grids/light diffuser panels and others do. I did onw and easily framed it with PVC quarter round, glues and stainless steel screws. Got plenty available for shipping.
There's a awesome idea
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Old 01-19-2012, 04:39 PM   #19
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Old 01-19-2012, 04:55 PM   #20
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Thank you
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