No need to quote, I will post it in bold here
Within a week, you should notice bubbles in the sediment next to the glass indicating the sand filter is working, within a couple weeks small tube traces should be visible in places in the sediments near the walls, and small bug populations should be evident. After a two week wait - and more time is desirable - fish may be added. UNDER NO CIRCUMSTANCES SHOULD YOU ADD "SAND-SIFTING" ANIMALS SUCH AS BURROWING SEA STARS OR SOME GOBIES. These animals are "sifting" the sediment to eat the sand critters that you need to have thrive. From this point, gradually add more animals up to the desired level.
Problems:
More imagined than real problems bedevil keepers of sand beds. The imagined problems are proposed by people who are ignorant of the sand bed dynamics. Among these imaginary problems are accumulations of hydrogen sulfide and detritus, and the need for sifting. Hydrogen sulfide will indeed be formed in the lowermost layers of a deep sand bed. It will NOT migrate up through the sediments to poison a tank. Hydrogen sulfide is an amazingly toxic gas, but that toxicity is exceeded by its pungent rotten-egg odor. The gas will have an exceptionally strong odor, and will seem overwhelming at levels well BELOW toxic amounts. If you can smell this stuff without it literally taking your breath away, it won't be at a harmful concentration. There is no real evidence to indicate that it may reach toxic levels in a deep sand bed.
Detritus build up in the sediment is another non-problem. If the sediment fauna is thriving, there will be a slight build up of fine detritus while the rest will be processed by the infauna. The final imaginary problem, the presumed need for sifting in a healthy sand bed, simply does not exist. Small organism movements "sift" the sand sufficiently. Any other sifting of a healthy bed will cause serious harm.
I'll let these people decide for themselves. No reason to drag this out. I've made my point.
I implore the others to read the full article, that will scare enough of them away from that.
AH, and the bad advise, I can post those links also, but I'll just bring one to mind right here, since you want that aired also. You advised a Aqua C nano skimmer to an rk4435. Bad move, he went with it, now he has to buy another skimmer, because that one isn't worth garbage, oh and the one you advised second, was the one I pmed him in the first place. To bad.......