This is pretty helpful information, as I was reading a book that recommended commercial soil-based substrates if one wants to grow healthy plants. Now it seems that may not be the best advice; if so, I don't have to spend so much!
I am wondering--how would it work to use play sand as a lower substrate and put a coarser substrate over it? I'm guessing that any fish that like to sift through the substrate will mix it all together over time . . .
And what are "root tabs"?
Also, I'm thinking of getting some of the smaller South American Cichlids and whatever fish might do well with them, if that makes any difference. My husband wants a community tank; I'm interested in the Cichlids, so I'm trying to find some sort of happy medium. If possible. LOL!