the only problem with my substrate is that some endlis will turn slate grey and they don't look so great. Only one out of my three is like that, the other two look good.
I just really like the fact that it's smooth so when they freak out, it's gentle on their bellys.
I'm starting to really like the way they look on red, but I doubt I'll change my main tank.
Thanks guys! I am gonna scrap the gravel in fear that one of my prized bichirs eats some stones. (Its very possible the way they attack their quarantined ghost shrimp) I am gonna go with a lighter colored tile.