Yes, live rock. I added 45 more pounds before I started the bio-ball removal and will add probably another 45 pounds in the coming weeks.
Right now I'm at about 80 pounds total in the tank and will be closer to 120 to 125 when I'm done.
Even with the bio-balls coming out, my ammonia and nitrites stay at zero all the time (except for a small, small bump for about two days when I added the last batch of LR
Figure in a substrate change to sand and I'd hope I'd be doing ok in a 90 gallon tank (and yes, I have a skimmer).
Most of the rock is in the display tank - but there are a couple of inches in the sump and I have a piece of "reef bone" (dead LR
that tested positive with vinegar) that I plan to demolish and add to the sump as well. It's dead right now, but I suspect it'll seed pretty quickly.
Linux: Because rebooting is for adding hardware.
90G acrylic/22G sump/TF100A skimmer
90lbs (45 liverocks.com & ~45 donated 14+ year old Fiji)
Imperator, D. Saddle Butterfly, 2 Percula Clowns, Cleaner Shrimp and an army of Hermits that never sleep