You can slowly stick it out with water changes so a bunch of it will be done before you start.I need to to a tank swap out here in the next few weeks. same tank size just a full replacement. red sea 650P around 180ish gallons
I have 2" of carib sea special grade my fav. sand.
I plan to put the fish corals and LR in to a tank with HOB filter, flow heater and light for maybe ( hopefully 1-2 days ) while I do the tank swap.
where i am debating is new sand VS rip clean the sand I have....I have have Dinos for 9 months now due the fact I cant get my N&P up under stocked covid and winter was hard shipping in fish.
anyway setting here thinking about it. either way i go new or used sand I will have to rinse the crap out of it. so I might as well use what I got eh?
only advantage of new I see is, I can prep. it for for hand.
Good luck with the transfer!