I would say you are good with any, but if you do get Utah rock just make sure to get it from some place that is safe. I have used it in all of my tanks (except current one) and have had no issues at all.... But then again I have never collected it, Ive gotten it from Mark or from Turbostud on the board (I dont think Turbo has it any more).
I just dont trust myself to go and find it on my own.
But you DEF can not go wrong with Fiji or Macro rock!
J
Edited by Jeremyw - March 14 2014 at 9:27am