"JHudson" wrote:

I'm just wondering because I want to put a few plants in a tank without
mucking with substrate(it just has plain gravel)

Strictly speaking, you don't *have* to use fancy substrates for a
planted tank. They help, of course, but if you've got a rich load of
mulm in your gravel (and most established tanks do), you should be
able to grow most plants, assuming good lighting levels.

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