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Old 08-20-2005, 12:58 PM   #1
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old useless undergravel filters?

What have you done with old undergravel filters? I have one lieing around wand was about to toss it but thought there may be some use for it yet. Any ideas?
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Old 08-20-2005, 02:21 PM   #2
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it can raise the height of the gravel in your tank.

just put it below and cover it with the substrate.

i have 1 question:
if one does the above thing it will mean that under the UGF there will be stagnant water (cause i do not think there will be water flow beneath the substrate and UGF). is that a good idea then?
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Old 08-20-2005, 02:26 PM   #3
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no need to put it under the gravel, good idea though amitnarain

well usually there isnt much flow to begin with under the gravel so i dont beleive it would matter too much
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Old 08-20-2005, 02:27 PM   #4
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Drip plates for a DIY Wet/Dry?
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Old 08-20-2005, 02:28 PM   #5
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i wanted to know whether that liquid that would remain under the UGF in the above case can turn out to something nasty that may affect fish.
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Old 08-20-2005, 03:30 PM   #6
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I've heard it can become anerobic, but never seen it myself. I found the old UGF plates work well instead of using screens for breeding Danios. And probably other egg scatterers as well.
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Old 08-21-2005, 01:17 AM   #7
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amitnarain.. is this what your trying to refer to?
Dr. Jean Jaubert's plenum method?
http://www.aquariumpros.com/faqpro/f...shtml#05208744
Ive never heard of it being attempted on a freshwater tank..
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Old 08-21-2005, 01:30 AM   #8
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I think he's just wondering if the water under the filter will get nasty from lack of flow.
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Old 08-21-2005, 01:33 AM   #9
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I just found a website recently about reversing the flow of the UGF, I will try and find it again, it was pretty cool.
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Old 08-21-2005, 01:37 AM   #10
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if you leave the UGF without any water flow you will get anaerobic bacteria under the plate.. very not good.
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