I did this recently. I emptied about 30 gal (90 gal tank), put the LR in a rubbermaid container with some tank water, put the fish in another container of water, then scooped out the CC with a dust pan. I made continers of the CC (with the good bacteria) out of knee hi's and after putting the sand in, I put the CC knee hi bundles on the sand. I then added the water I had already made up, waited for the dust to settle and the next day the fish and LR went back in. All happy. I started taking out the CC bundles after a couple of days and within a week they were all out since the parameters were perfect. It was a lot of work and I'd advise you to have someone there to help. I did it alone and it was not an easy chore.