Has anyone used the Kolorscape sand that you can get at home depot? I believe it is the new name of the old castle sand. I vinegar tested it and it fizzed about as much as ginger ale. It looks like there is quite a bit of quartz in it as well, but my plan is to make a deep sand bed and use kolorscape for the bottom layer and then cover it with 30 lbs of live aragonite sand (I have a 30gal by the way). I will also add a bunch of handfuls of additonal live sand from multiple other tanks. I was just wondering if anyone else has used the kolorscape and if they had any problems.