Transfer sand bed?

[Metrontech]

Hey looking for some help and clarification

I have a 55 gallon mixed reef which will be transferred to my new 120 gallon with 55 gallon sump

The current tank is 10 months old, so the sand is 10 months old

I vacuum the sand, or at least 50% of the sand in a reg basis

Can I just transfer it to the new tank?

I have read a lot about Re-cycling etc and nitrate boosts etc.

I am running high grade gfo in a reactor with zero phosphates and less than 5 nitrates all the time.

Any help?