What is a "matured" reef tank?

[Dearth]

Originally Posted by squibege

Seasoned reefers at least know what rules are made to be broken

This quote has gotten us so called experienced reefers into a lot of trouble because we tend to know what our tanks are doing or what the parameters are doing and invariably we end up screwing something up because we know better but ignore the telltales it's happened to everybody at least once usually more we are our own worst enemies at times