10 pounds of Rio Escuro XF. Looks pretty dang sweet in the bag. Here's a pic of the grain size.
Expensive, but I think it'll be worth it. This stuff was only around for a brief time, but all the info I could find on it was positive. Hoping it's not going to be regretted.
I'll likely use it in a future shrimp tank build.
Yes, it is said to buffer down into low 6's. I got the last two bags of black from a seller here on Tpt. Not sure if it's proper to mention here. He still has the brown version. From what I've read, this substrate buffers like other products out there, but doesn't break down into mud like some. The little bit of info I did find came with glowing reviews, so I thought I'd try to publish my experiences with it.
Yeah this stuff is great. I've read up on it and it's had glowing reviews. It's very pricey though and I can't with confidence say its better than amazonia. But, its nice to try out a variety of brands out there.