I had a hard time deciding too. As I remember it.... I talked to ADG and Jeff said that the Amazonia seemed to grow plants the best. The other products do fine but I decided why not get all the nutrients I could. Also people say that the black reflects the colors of the fish better. That is why most use a black background.
Having said all this, I think you just need to get what you like...
Having said all this, I think you just need to get what you like...