You could remove a few scoops a day. Concentrate on one small area. Then add the new sand to that area.
Do it gradually and you shouldn't have any problems. This method worked for me but I was removing and adding crushed coral - only way to keep the sand on the bottom of my 100 gal bowfront corner tank.
AquaAddict
PS I once had one my Maxi Jet power head's suction cups give way and it removed all the sand down to the glass on one side of the tank. The water was opaque white! I put it back and nothing happened to the tank - lps, sps reef.
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