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Old 10-01-2020, 02:56 PM   #6 (permalink)
hoppycalif
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Default Re: Mudboot's Return to the 125

It looks like the wood pieces rest on top of the substrate. That is an invitation for hydrogen sulfide to form under each of them, leading to very bad smells, and toxic problems for the plant roots. We need to sit pieces of hardscape directly on the bottom tank glass, with the substrate surrounding them, not sitting under the wood.
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