Hmm, thank you guys. I guess now i'm wondering if i try it out as i see a local hydro shop selling 10L of it for $10- should i fill the voids with sand so the roots dont become susceptible to rot? It's a substrate/plant question was unsure of where to post, but the first question was substrate related, which brings me to other concerns lol
Don't use any of the stuff like hydroton that's made for hydroponics. The diameter is way too large for a panted tank. Petsmart sells a much smaller version over in the reptiles section. I think it's kinda pricey though.