How much lighting/adding sand bed?

[Dorkel Marine 1]

:Hello and many thanks to reefburnaby and stephane of Quebec. Stephane your tank looks great and really enjoyed your photos. Thanks again you guys for your input. I'll take out the crushed coral and have already lined up some calcium based sand from J&L. Next question. Should I maybe add about 5 lbs of sand at a time and let it settle is that to fast. I would like to maybe take all livestock out and do it all at once. My concern though is that the water parameters might go a little wacky. But then its just plain sand. Appreciate remarks in advance.