[Cmeister]

Use in modesty. I bake my dirt first to try and remove organics, then mix in peat moss. Then cap with something inert. Peat moss is good in the aquarium FYI.

 

[Cmeister]

I believe a aquarium enthusiast I know uses something along the lines of Turface for its CEC properties. I don't think he caps it with anything, he goes dirt below, Turface above. He gets excellent plant growth, so you don't see the substrate in his aquarium, so it doen'st matter if turface looks funny for him. I've never had that much luck with plants, so I* pay up for something with more aesthetic properties.