Pros - has anyone knows if this Back to the Roots mix is good quality? Not to use it by itself, but to mix it with another mix of red black lava rocks, Maifanitum stones, Green zeolite, akadama, perlite, vermiculite, pumice stone… like 50/50 or perhaps 30% of the back to the roots one… I am using it mainly for cacti and jades… thoughts??