For what it's worth, I have been using Aquasoil Amazonia with a layer of Power Sand for the last eight months and am very impressed with it. In my experience, it isn't true that it doesn't cloud tank water, but that seems typical of most planted tank substrates. I wouldn't recommend rinsing it, though. I personally haven't had any problems with it breaking down at all. My only issue with the substrate is that when I did my first water change before I had any foreground plants grown in, the PS ended up rising to the top of the AS due to the substrate being disturbed. Since then, I've had pieces of PS on the the surface in my foreground, which initially bothered me a lot, but isn't much of a problem now that it's covered with plants. And no, simply pushing the PS back down into the substrate was not effective, so I gave up on "fixing" it. It doesn't seem to have negatively effected that area of the tank's ability to grow plants, though, and I could have avoided the problem had I realized beforehand how easy it was to disturb the AS when there are no plants anchoring it down.
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