Planted Tank Obsessed
Join Date: Mar 2008
Location: Rodenbach, Germany
You'd want the Azoo substrate on the bottom- it's actually a nutrient-dense substrate(which you want down by the roots). Azoo will also break down faster if you mess with it too much.
Over time, the Flourite will mix with the Azoo. It won't hurt anything, but it might not be the most visually pleasing.