My only concern with the black is that some of it is magnetic - I scraped my biocube (my very first tank setup) and got rid of the black.I really like CaribSea's Hawaiian Black. The grain size is a little big so I mix in a finer grain black sand in with it. I've always kept burrowing critter and it's never been an issue. However, I love diamond gobies but haven't had one since I switched to the larger grain because it's just too big. Burrowing gobies and shrimp - they're good. Sand sifting critters - no the best.
I tested the Hawaiian Black before I put it in the tank and didn't have that problem so I went with it. I don't know if its batch specific.My only concern with the black is that some of it is magnetic - I scraped my biocube (my very first tank setup) and got rid of the black.
I need to take a closer look at Ocean Direct! I haven’t seen it beforeI went with CaribSea Ocean Direct. I like the small shells and different shapes and sizes in the sand bed. It looks more natural to me.