It's just your regular live rock. There's not been any additives added. The 15 gallon has been cycled and is about 8 months old. I never added any fish because soon after i started the 15 i knew i was going to go bigger real soon. So all that's in there are 6 snails, a few crabs, and all the regular hitch hikers. There's a sweeping powerhead, penguin mini power filter, heater @ 74*, 50/50 and 10,000k flourescent lites, Prizm skimmer, crushed coral base 1" deep.
0 ammo.
.25 nitrate
1.028 s.g.
near 38 salinity
thanks