I've only had Flourite Black Sand for a couple weeks, and it's in a planted only tank. I like it, but then I don't have to deal with gravel vacs or anything since there's no livestock. Since it's only been up for a few weeks, I can't really attest to how good it is for plants, but many people say that it's great.
I have a mix of Eco-Complete and gravel and laterite in another tank, and I really like it. I wish I had Eco only in that tank. It's a mix of larger more gravel-sized bits and finer almost sand consistency bits. Supposedly, it naturally settles so that the larger bits are at the surface. Anyway, it seems to be good for the plants. My crypts are doing awesome, and the recently added Echinodorus bleheri "compacta" seem to like it also (Amazon sword mini plant). I also have some others, but they aren't really planted in the substrate, like anubias and Java moss and ferns.
Anyway, I like them both. I think that the Flourite sand would be better for bottom feeders like cories, and I generally like the looks of sand. But, they both have a nice black color and are good for plants. You have to be careful, though, that the Eco Complete doesn't have a whitish colored liquid in it as that has gone bad. The liquid should look more clear with a slight black cloudiness to it from the fine silty material. I heard someone got some that the liquid had turned milky white, and it crashed his tank. I guess that there had been a bacteria die off or something like that.
I have a mix of Eco-Complete and gravel and laterite in another tank, and I really like it. I wish I had Eco only in that tank. It's a mix of larger more gravel-sized bits and finer almost sand consistency bits. Supposedly, it naturally settles so that the larger bits are at the surface. Anyway, it seems to be good for the plants. My crypts are doing awesome, and the recently added Echinodorus bleheri "compacta" seem to like it also (Amazon sword mini plant). I also have some others, but they aren't really planted in the substrate, like anubias and Java moss and ferns.
Anyway, I like them both. I think that the Flourite sand would be better for bottom feeders like cories, and I generally like the looks of sand. But, they both have a nice black color and are good for plants. You have to be careful, though, that the Eco Complete doesn't have a whitish colored liquid in it as that has gone bad. The liquid should look more clear with a slight black cloudiness to it from the fine silty material. I heard someone got some that the liquid had turned milky white, and it crashed his tank. I guess that there had been a bacteria die off or something like that.