Sand bed ---> bare bottom

[leftme]

I have not totally decided to go bare bottom but I am thinking about it.
I want to change my mag5 return pump for a mag9.
The tank has been running for a year.

As for macroalgae, I have some red spiny looking stuff and green leafy stuff that was on some LR that I bought from someone, I don't know what it is though. And neither of these algaes grow very fast.

So what are the pros and cons for BB tanks?

Clayton