If DE is wet it does not work. I think the constant moisture of the soil would render it useless for bugs. If you had a layer on top of the soil and were bottom watering it may work.
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“Enter by the narrow gate; for wide is the gate and broad is the way that leads to destruction, and there are many who go in by it. Because narrow is the gate and difficult is the way which leads to life, and there are few who find it."
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