Sillyfishies
Aquarium Advice Addict
I haven't seen any black aquarium sand here and I've asked. I did look into the blasting sand but it contains particles that can be too sharp for bottom dwellers like corys. I really don't have the money to buy anything expensive that's why I was thinking pfs or play sand. But I'll only replace the gravel I'm using if its going to look better with the lighter sand I'm just not sure yet.
I've only heard that its too sharp from people who DON'T have it. Everyone who does says their Cory's are fine