The Planted Tank Forum - View Single Post - Substrate questions and suggestions, please?
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Old 07-25-2013, 01:28 AM   #3
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Sure good soil is the basis for gardening on land or under water.
The soil chemistry is not too different.
The microorganisms are not all the same.

A good soil for garden or aquarium will hold fertilizers in a way that the plants can use them. Look for a material with high Cationic Exchange Capacity.

Sand does not have it.
Gardening in sand is not easy, aquarium gardening in sand is a bit easier, but not as easy as it could be if you had a better substrate.
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