80 lbs of Aquaforest AF rock for 98G 5ft shallow tank?

[Muffin87]

As per title -- considering it's dry artificial rock -- would 80 lbs of Aquaforest AF rock be enough for 98G 5ft shallow tank?
I assume in terms of weight it's gonna be similar to Marcorocks (or lighter according to some people).

Should I get more? Or is that enough?

 

[blaxsun]

I have maybe 125-140lbs total in my 160-gallon display, designed as a shallow reef - so I think 80lbs would probably work. Here's what my tank looks like (it's approximately half marco shelf rock with the rest marco shelf rock).