I've called every pool supply and hardware store in my area and have been completely unsuccessful at finding white silica sand. I finally found a place that has white silica sand that's actually white (everyone keeps saying "yeah, this stuff is white" and I open the bag and find it's about as white as the night sky), the problem is that it's much larger than the other sand I've seen. From what I understand, people typically use 30 mesh sand in their aquariums. This is 16 mesh sand, but it's the only white sand I could find locally or even online. Do you think this will be ok for my mbuna setup? I'm keeping demasoni, yellow labs, red zebras, acei and synos. If the large sand won't work, does anyone know of anywhere I can order the right sand online without spending a fortune? Thanks in advance for your help.