First, you need to decide what type of planted tank you are going for. Will it be a CO2 enriched "high tech" tank? Or is it going to be a non-CO2 enriched "low-tech" tank?
For a CO2 enriched and high light tank (> 2.5~3 wpg), substrate is not so critical. You can even do without base fert.
For a non-CO2/low light tank, you are going to need a good soil substrate top with gravel.
BC
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