A question about switching salt

[Keri]

Thanks all!!
It is starting fresh but I will be switching over everything (LR, fish and inverts) from the 65 into the new 120.

I could start doing my water changes into the 65 with IO if that would help?

Also: I don't want to lose all of the inverts in my sandbed, what's the safest way to bring the sand from the 65 over to the 120? (I was thinking very slowly, a bit every day/couple days)