Jennifer's right, and especially about this : "That doesn't mean that the same setup will work for everyone though. A large part of Luis Moniz's success is because he is talented and has a lot of experience figuring out what works for him. I am sure he could make an equally beautiful tank no matter what lighting he chose."
That's so true.
When I started, the advices I could get from people on forums are a huge help for me. I can't imagine how it was before internet
So if I could help you Joe, I'm just happy.
About Manado, it's a JBL substrate, looks like rounded granulate grains. There are no nutrients in it (that why I add Aquabasis) but it's porous and neutral in water. With plants like cryptos or echinos, which have strong root system, it works well. They say this substrate is like a battery, storing the excess of nutrients. As I could see in my own tanks, it seems right. As it's rounded, it doesn't hurt fishes like corydoras for instance.
I remember some people on this forum, use it.
So I think you can find it in NZ. And it's not expensive.