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Discussion Starter · #2 ·
OH @dwalstad i just realized why I’m not getting anerobic condition, the gravel under my dirt is probably acting like a plenum
 

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the gravel under my dirt is probably acting like a plenum
Can you elaborate on that? You mean you have three layers?
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gravel
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dirt
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gravel
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I would think the dirt would work its way into the bottom gravel layer, since it's finer. But I'm not sure.
 

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Discussion Starter · #4 ·
There is a layer of seran wrap over the bottom gravel b/c I used the thing as a drainage layer when I tried to make it a vivarium but I couldn’t find plants for b/c it was cold
 
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