The system is about 4 years old. I moved it from a 90 gallon into the 125 about 3 and half years ago. The purple and yellow tang, the Flame angel and the clown fish have been with me from the start and I aquired the Orange shoulder from a friend of mine that has a really nice 90 gallon. I had an HOB filter and then a canister filter and then decided to go with just the skimmer awhile back and everything is good. I even deployed a few times with the military for 3 to 4 months and everything went just fine. Last year I moved the whole system down from the Seattle area with the only casualties being a Colt coral and a brittle star.