| 1. | Add some perlite if you have them in regular potting soil.
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| 2. | Use a pot of bark and perlite, but no soil.
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| 3. | Because obsidian is hydrated when exposed to groundwater, forming perlite.
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| 4. | Common media include diatomaceous earth, or kieselguhr, and perlite.
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| 5. | Older ships can have independent tanks with loosely filled perlite insulation.
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| 6. | Perlite is chemically inert and neutral and doesn't break down.
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| 7. | A basic orchid bark mix contains coarse grade perlite and fir bark.
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| 8. | Perlite filters are fairly commonplace in filtering beer before it is bottled.
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| 9. | Most potting composts contain a combination of peat and vermiculite or perlite.
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| 10. | Plants are grown in sand, perlite, coconut coir and rockwool.
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