Should I add more rock to this tank?

It's a 72gallon,

I have no ideas how many pounds this tank has though ?

 

It looks fine. If you kept your receipts from the rock purchase you wouldn't need to guess the poundage. People estimate anywhere from 1 to 2 pounds of rock per gallon. I think that you have a fair amount of rock there. If you can add some more, even better! Since we don't know how many pounds are there, the more the better.

 

You could if you desired. Most have their rock 50% to 75% of the depth of the tank.

 

I received most of my rock from an established tank,I know there is 40lbs of base rock, but I didn't think to weigh the live rock before it went in..,, maybe I'll add another 30 lbs or so that way I at least know there 60

Would that be a good idea?

 

Your scape looks good IMO but a little more rock can't hurt. Go for it!!

 

Lookin good JD. 8)8)

 

more is sometimes better but that looks pretty good IMO