I have a 2-3 inch deep sand bed in my 55 gallon tank and am thinking of switching over to a more heavy substrate. The sand gets easily blown around by my maxi jet 1200's and it continually ends up on my live rock and masks the coloration. I blow it off with a baster, but it happens once again within a day or two. Has anyone else had this problem? How difficult or hard on my livestock will it be if I switch to a heavier substrate by changing half and then the other half two weeks later? Thanks in advance.