Good afternoon everyone! So as the title implies, I am thinking I might want a bit more rockwork in my tank. It is a 90 gallon, been set up since September last year. It is pretty well established now, and has about 50 LBs. of base rock which is or course now all live rock, as well as about 30 pounds of live Jakarta rock. I an thinking I might wat to build another cave or 2, and of course base rock is MUCH cheaper. Can I do this with about 10 pounds of rock? Or would be too detrimental to my tank?