Sorry if I was unclear rlablan with my post, I am thrilled to have the black sand, but was worried about how it discolored the water after I put the water in the tank. I did use a small strainer to flush out the sand before I put it in but was still worried about how it was looking. I have never used black sand before and this effect hadn't happened with the white sand. '
Spanko, thank you for the information. I left the tank running with a powerhead through the night and it has settled but the walls are discolored and there is a film on the sides and top of the water from the black. I hope this is okay, I am starting a seahorse tank so I am trying to be extra careful not to introduce anything into the system, which is why I bought the "dry" sand for this tank versus the "live" sand. I just hadn't had this happen before...