Black sand is awesome ...I have it in all my tanks
Plus for me when a lot of people say they have zero problems ,i would just like to point out i had zero problems with my humu trigger for almost 3 years and a clown trigger for about a year and a half then they snapped..my humu killed 3 fish and probably would have killed them all if i kept him..My clown almost killed my blue throat
Just something to keep in mind,,success IMO isn't a few months without problems when keeping certain groups of fish together, its years ,many years