120 Upgrade Question

[wardworld]

When I move from my 55 to my AGA 120, I'm switching from CC to DSB. My main question is in what order should I do it?
For example, I read somewhere it should be LR on the BB and then add the sand around it. Is this correct? Any other ideas?
Thanks,

[t5Nitro]

I would put in the sand then rock.

[staticx]

some people say add the rock then the sand others say add the sand then the rock. Glass tanks scare me and I would be afraid of putting rock right on the glass but I know several people do it