Yeah, i don't think they make Southdown anymore. Or you can't buy it anyplace. I think it's probs got something to do with big stores like homedepot and lowes using exclusive contracts with companies that make it. Like, they sell qwuikcrete brand sand, and cement, and gravel, and so on. No room in the market for the little sandman.
I heard that if you put a sample of the sand in a little vinegar, it will fizz if it's the right kind like Southdown was. Something about calcium carbonate will, but Quartz won't?
Some people do all rodi, but most use tap and then rodi for the last one, or treat the last one with chlorine remover like Prime.
Live sand can be dirtier than dry, since you aren't really supposed to rinse all the bacteria off (I mean, you can but it's a waste of $). It usually comes with a little packet of water additive that's meant to weigh the sand down. Dunno what that might be though. So I'm not really sure what "clean live sand" gmlee is feistin
Yeah like any sand it takes time to clear. If you prefer your southdown or whatever then fine. Live sand is my preference since I have a smaller tank. If I knew someone in the hobby I would get a few handfuls of sand.