Changing live sand

[likwid]

Hey guys,

I have a 28 NanoCube HQI that has been set up for about 8 months now. Everything is going great and I have never had any problems with algae or anything. The only mistake I made was using crushed coral as my substrate. I would like to replace this with a very fine white live sand. How hard would this be to do, what is the best way to do it, and what are the repercussions of swapping out substrate?

Thanks