If using raw topsoil in a DIY terrestrial substrate mix, what crucial subsequent step is required?

Answer

Thoroughly capping it with a cleaner, inert layer like sand or fine gravel.

Raw topsoil, while providing excellent organic matter, must always be thoroughly capped with an inert layer like sand or fine gravel to prevent it from clouding the enclosure when disturbed.

If using raw topsoil in a DIY terrestrial substrate mix, what crucial subsequent step is required?

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How to make Substrate!

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