Tnk is 1 year old, no trites, trates or amonia at all. 90 gal with a 5 gal fuge that goes into a 20 gal sump. Skimmer is an urchin pro driven with a mag 3. flow with 4 maxi jets and the mag 7 from sump along with an emporer 400 for mechanicle filtration. tank inhabitants are- 1 ocellaris, 1...