Hi everyone. I'm in the middle of redoing my 29 gallon aquarium with new equipment, new substrate, and eventually new plants. I'm keeping a video diary for my project, and I've posted one video so far that shows my current (and very poorly maintained) setup. Here's a link: [ame=http://www.youtube.com/watch?v=P9HMT1VIfaQ]YouTube - 01 Beginning Setup[/ame] I also just posted some questions about choosing sand, so if you haven't looked that that yet, read it here>> http://www.aquascapingworld.com/forum/general-aquascaping-discussions/4327-choosing-sand.html Okay, so a few threads ago I asked everyone about their pick for the best substrate. Most of you agreed that ADA Aquasoil is really good stuff, although it isn't necessarily the "only" really good substrate out there. After checking the stuff out on Aqua Design Amano USA/ADGshop.com- now available in the U.S.A, prouldy offered by Aquarium Design Group. The finest planted aquarium products., I've learned that it isn't terribly expensive - at least it isn't as expensive as all that Flourite that I bought! So now that I've decided to redo my aquarium with Aquasoil, I need some help selecting a type. It looks like the "industry standard" is the Amazonia type, which looks like a nice dark brown color. I'm good with that. However - there are two "types" of Amazonia. Powder type, and Normal type. Powder is more expensive. Question #1: What's the difference between Normal and Powder type other than the size of the pieces of the substrate? When would I want to use one type over another, and why is Powder type more expensive? Is the Powder type like sand? Question #2: There is also Amazonia I and Amazonia II. What's the difference there? The price is the same. I've heard some people say that Amazonia II doesn't leach out ammonia like Amazonia I does, but I've also heard some people say that that isn't the case. So what's the difference? Thanks again for the continued help!