A detritivore kit is want you want to bring the sand to a live state. Not a clean up crew, and not the creatures drifting down from the rocks. These are completely seperate organisms. The sand you received is nice looking, and it will work well, but as you have noted, there is a serious lack of the micro and macro organisms needed in a functional "live sandbed". It is what I consider starter sand, and a detritivore kit is used to finish up the live part.