Tank Upgrade Question

[Thrashed]

So in the next few weeks I will be upgrading from a 90 gallon to a 150. Tank is running good, I am going to reuse my sand and all rock in the tank. I already have most of my rock for my new tank soaking in water from a water change a couple weeks ago and changing it weekly with my weekly water changes. So I know I'll be adding a good bit of new water as well as a couple new bags of sand. Should I be looking for any mini cycles or anything out of it? Should I use any of the water from where I've had this rock soaking and use it or just use full new water? In the past I've always done small upgrades like 75 to a 90 then a 90 to a 100 and so on. This will be my first time adding this much new water to a system in an upgrade so I'm kind of curious

 

[vetteguy53081]

Some of the water yes- Sand, NO
START with new sand

 

[Pico bam]

Personally I would use new water. Just to give it a fresh start. Although I think anything would.

 

[Thrashed]

Some of the water yes- Sand, NO
START with new sand

Why fresh sand?

 

[vetteguy53081]

Why fresh

Why fresh sand?

Old sand may have phosphates precipitated into it from the previous tank as well as detritus.
If you’re adamant in using it. Rinse/wash it well to clean it.