if it does not cycle the tank the minute it was assembled, meaning all life you add now will live, then we have a twenty page thread on live rock skip cycling to update
200 jobs no fails, that reliable.
how two different people evaluate a cycle closed though, that ranges bigtime.
bigtime. some folks will not disbelieve a test kit and some will
in the end there's a handy side proof: animals that feed, swim, act normal day by day in clear water.
contrasted to a test bucket start: dry sand, dry rocks, a couple clowns no other additives and water. uncycled. clowns are dead by the morning, and the water is cloudy.
living animals are truly a reasonable measure of a cycle closed, sometimes more consistent than test kits allow. *that doesnt mean the ideal way to cycle is add life and take a chance either
it means there are other ways to interpret ammonia test kits, even if they read .25. you could dose your system with ammonia a little to see if it goes up then down, if so that's proof before adding animals. the motion proves the ability, not the final reading/that may be stuck at .25 classic for api. we wouldnt consider the nitrite or nitrate readings using updated cycling rules, but old rules will require that. how people define a closed cycle ranges person to person, and decade.
this picture set from JackA shows a fully cycled reef behaving normally on api. notice the 1st pic, the lowest ammonia possible in fully clean and changed water, still isn't hard yellow zero/ that reef was stalled by old rules, but per new rules he's now got fish and corals. the ammonia moved, he was at day ten on Dr Tim's, done:
that above is the ammonia after a 100% water change, known zero condition. still reads .25 expected.
this is after adding raw ammonia to the tank to drive up reading:
then in 24 hours later, ammonia moved down to:
he then added fish/all set. reefing.