Stability is a kind of objective term. With the exception(s) of some huge outside occurence ( Kalk Dump, Topoff Run Amok, Heater Failure, Power Outage, Treating with Flatworm Exit). I consider my tank/system stable for decades now.
I don't have to add anything to maintain any relevant or irrelevant #s. I don't have to chase fish diseases. I have coral pests, but pretty much everyone's got one cootie or another. But the corals are colorful, appear healthy and are growing.
I don't worry about it. As long as there is topoff for evaporation. My system remains stable. Fish flourish, Corals Grow, Things reproduce. When you have various animals - especially the more sensitive fish doing the Barry White Groove Thang in the evenings then you must have a pretty stable system.
Stable for me is the confidence to check the CO2 tank for the Calc Rx and walk out the door for a 2 week vacation and the only thing the tank needs is some food and an algae wipe. There are no specific instructions left with wife or house sitter while I am gone. There is no fear of something going out of whack. There is the fear that "Feces Happens" - LIke a critical piece of equipment failure - a return pump, a heater. But other than those 2 things my system should remain stable and not risk or jeopardize the lives I am responsible for - for a considerable amount of time.
Assuming a 'System' is stable, what does it take to keep conditions ideal for the livestock to flourish. Stability of your parameters (without intervention by me) and Keeping my filthy hands out of the tank.
Dave B
