Layered Substrate, tutorial, for Aquascaping, beginners,
Channel: Your Tap water is Crap
Date: 2021-05-08

I've spent over a year watching videos on YouTube, researching google, asking other hobbyist about proper substrates for your aquascapes. 
Almost every YouTuber are extremely vague and just simply say use this, or use that, but never explain what it actually provides to your plants and how long it'll last. 
The reason for this is, because they were paid by the company to promote their substrate. 
I've used them all. I realized I can't rely on people who are essentially marking a specific substrate.