I have no idea what to get. At some point I intend to plant one of my 125's. I like the look of the Amazonia. What is the difference between I and II? Powder and Normal type? What about the ferts they sell?
Don't worry about the Powder type - that specialized use stuff. You want
the Normal Type. Difference between I and II - probably the binder.
I've used their ferts with good results. You dont need to spend $ on the ferts.
Seachem stuff works just fine. I would get the Green Gain and ECA though.
Both are nice! One is a hormone to get plants to branch out more, the other
one (ECA) has something in it that makes the colors pop.
The difference between the 2 is that versions II buffers the water less, wont leech as much tannins and I assume has less organics in it. People with hard water have problems with I so they came out with II to clear that up.
The powder type is smaller grain, designed for small tanks
I dont have any experience with the ferts, Im sure they work, just expensive
For the 125 maybe 8-10 bags? Not sure on that one, I used 2.5-3 on a 55