our hobby was never going to progress out of old cycling science rules as long as we solely had API and red sea ammonia testing on file, which is pure madness we can see in searches. lots of false stalled cycles.
but when we switch to seneye, or, we take years to study what 1000+ seneye posters have uploaded to the web, new rules simply emerge due to stark patterns on file.
that thread above was built solely on using updated cycling science.
ways to expand the rule of lost/gained bacteria and still keeping a reef tank in balance:
the live rock surface area is what runs the tank. on any reef here, any reef tank on any web site in the world, we can instantly remove 100% of their sand and not put any back, and the cycle wont crash.
before removing that sand, we could also install 5 brand new canister filters = massive surface area and bacteria, and let them seat into full cycle ability, and instantly remove all 5 of those seated-in filters along with the sand, and a seneye still won't show any loss of ability.
live rock surface area is so powerful, we could also remove 50% of the
live rock and the tank still won't crash
we did that several times above (because they wanted to change from a rock pile to an NSA clean aquascape {barely any live rock use} all at once)
old cycling science could never ever do the jobs we do daily above, that's over 2 mil $ worth of uncrashed reef tanks/still growing with weekly new jobs.