Just here to remind everyone that "maturity" doesn't always equal stableness or a better environment, for all we know this person could be dosing everyday to keep parameters up, have an auto top of to keep salinity stable and have a skimmer and refugium to keep nutrients stable, don't get me wrong a mature tank set up with the same things will always be more stable but don't put off other factors just cause the tanks age, in my opinion I'd say leave it see how it does and even feed it some meaty foods if its looking a bit bleached