Should be fine since you bowl feed. Someone else suggested to me that you could also blend live moss (Joshsfrogs also sells it) with the coco fiber and it will grow right out of the background if kept wet.

Six plants should be enough. You can always add more later if needed. One of the things I've learned in the hobby is that when it comes to plants, you always have less space than you think. It is easy to overlook the ability of plants to grow and offshoot. Try to have at least one broadleafed plant in there as red eyes love sleeping against leaves big enough to obscure them completely.

Oh, and we demand pictures