what are the benefits of having both gravel and sand?

[Felf]

i'd like to know what they are, if any TIA

 

[malkore]

benefits? none really. neither plain gravel nor plain sand have any nutrient benefits to plants...they are inert. if you have moderate to high light, and root feeding plants, you'll have to use root tabs under those plants.

 

[Felf]

ok thanks