According to Dr Ron ... there is no difference in sand choice other than the appropriate mix of grain size ( DSB that is ) so use whatever you can get your hands on ... you could go with no sand at all as a bunch of reefers on RC are doing because they claim that the DSB that they were running was causing algae blooms and even Dr Ron says they only last about 4 years and then should be replaced ? ... there is always a ebb and flow in this hobby cause what is the latest/greatest this week is trash next week but in a year is the best again
Cheers