I didn't like the regular Fluorite (the brown and red gravel substrate). No matter how much washing and maintaining I did, it always kicked up dust when I did anything. Moving plants or decorations, water changes, etc. Some may be able to deal with that, but I couldn't. I have used Eco Complete (black) in two aquariums and really like it. It doesn't have the same 'dust' issue that Fluorite had. Plant growth in both has been about equal, but I was also at different stages of my planted aquarium experience when I've used them. When I used the Fluorite, it was the very first time I had tried to grow any aquatic plants. I'm not much more than that now, but I do have a little bit better knowledge than I did then, and it's been about five years, for what it's worth.