I gotta tell you that this upsets me a little bit... not this particular post, but the whole generation of reefer who knows more about CREE diodes, BRS videos and how to post on a message board, but have no idea who Dr. Ron Shimek is nor the things that he has studied and tought. This is as amazing to me as people who claim that they know all about the constitution yet have never read any Madison, Lincoln, Adams, etc. The hobby as you know it today owes something to Dr. Ron and his kind, even if it is not known too much anymore.
Dude has been reefing since the 1970s (I think) and has forgotten more about reefing that most of the people online will ever know. I have seen some new people of the bio-cube generation (and newer) dismiss him as a has-been dinosaur, but nothing of note has changed in reefing in the last 20 years of any substantial benefit except for T5 reflectors and high quality foods like PE Mysis and Tropic Marin. Every other "innovation" is bunk and really only provides a different way of doing something that happened back then.
He knows what he is talking about. If you want a deep sand bed, then follow his advice and you will do well. If you want a high flow tank, then go with a shallow large-particle sand bed. I can tell you from personal experiece that a 3-4" sandbed of mixed size (it is mostly small), larger simmer and real live rock from the ocean has always, and always will, make for the best tanks for the majority of folks. I don't like a deep sand bed.
I you wanna know how to reef. Find some old archives of wet web media and just read. These are actual experienced people giving advice from actual experiences and not just some jazzass who posts online just because they can. There have posts going back to 2000 or before that are still salient today. If you actually learn something here, or even from all of the articles that Dr. Holmes-Farley had written, then you will know enough to know that nearly EVERYTHING that a vendor or manufacturer has told you is at least in-part incorrect or not a full-out fabrication to sell their product.
Dang! I just read this and I sound old. Sorry... not sorry (does that phrase make me young again?)