Vacuuming a sand bed or not That is my question

[MitchM]

Originally Posted by Basile

...You have a population of critters in your sand bed that establishe itself . If every week or two weeks you disturb that ; your getting rid of alot of helpers and those bacteria who helps you. Never mind shallow or deep it doesn't matter....

Basile, that is incorrect.
A Deep Sand Bed in a reef aquarium is like a separate organism in itself. In Canada it is almost impossible to properly construct, populate and re-populate one with the appropriate organisms.
You can run your aquarium however you like of course, but your statement above does not apply to a sandbed that will help process wastes in the long run.
If you don't maintain your substrate, you will be dealing with excess nutrient problems eventually.
By maintaining I mean manually removing any detritus buildup.