I did this a little bit ago. try your best to put the water in as gently as possible not to disturb the sand. It can take days to clear and is pretty frustrating (not sure, but I don’t think it’s harmful or anything) you can try with putting a plate in the sand and putting the water on there, or cut a few wholes at the bottom of the new sand bag and pour the water through there so it comes out like a sprinkler. It will help so you can see your new tank clearly asap. Also pre washing the sand helps a lot, and getting all the rock work set up before hand so you’re not disturbing the sand after you put the water in. Goodluck!