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Old 08-02-2018, 08:31 PM   #563 (permalink)
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Default Re: How-To: Mineralized Soil Substrate, by Aaron Talbot

With a soil bottom layer, when you use pool filter sand as the top layer, you don't get mixing of the two materials. You do have to be careful when poking plants into the substrate, and if you make a mistake and pull the plant back up, you can get some soil on top of the sand, but it migrates back to below the sand over time.
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