in the tank there is about 80 lbs of live rock, 4 or so inches of live sand, a few crabs, 2 cleaner shrimp, and 2 clown fish. The only addition i have made has been a zooanthid that is 4 x 6 inches or so. I have also found a mushroom that is growing out of one of the live rocks. the specific gravity is 1.025, nitrite .2, nitrate 5, ammonia .1-.2. I will try and take some pics of the setup for further advice. He had it running for about 1 year, i have had it for 2 months, when i got it i washed the algae of the live rock and did about an eighty percent water change