Tank is about 5 years old. inhabitants First lived in a redsea 100ish gallon.  About a year ago I purchased all fish and coral from a fellow ARC member that was moving.   I stuffed everything into my 90 gallon that was 3 months old at the time. 
I added the Foxface and Wrasse.  I have Tangs.... Blue, shoulder, or lieutenant, Yellow.  A pair of clowns, a few damsels, File fish, and a few other small no names.  2 urchins, along with lots of snails and crabs.  
Coral.... I am bad with names.  I have two colonies of Walt Disney, some acro, shrooms slimmer, hammer, torch.  and a few encrusting corals.  
I control it all from an Apex with the trident. Keeping prams at 9, High 400s, and Mag around 1400.  Nutrients are kept around .2 , and .04 for phosphates.  
I dose Alk, CA and Nopox with a DOS
Kalk is continually sent into a diy kalk stirer auto top off.  using a Kamoer continuous pump  .  
Sump is a Trigger Platinum 34 roller fleece. and a DC skimmer.  
I am sure I am missing some equipment and inhabitants.