If you have one or more established healthy tanks it makes no sense to setup a new tank with bottled ammonia and wait 6-8 weeks for a cycle to happen.
There's absolutely nothing inhumane about properly seeding a new tank with beneficial biology, fast growing floating plants, and using common sense about stocking. I've done it many, many times and never lost a fish!
It's pointless to debate something that's been done successfully so many times.
I take a new tank, fill it with 1/3, 1/2, or 2/3rds old tank water
from another tank that may be slightly cleaner or dirtier.
Next, add a few existing "seeded" sponges
(of the many) from stacked foam media trays or compartments, and lastly add new fresh treated water
I mixed from a 55gal (tap+declor).
-Partial/percentage used sponge from old filter.
-new water +old water ratio.
-add bio starter just to be sure.
Quick start bio-in-a-bottle is needed at all. A bit can help though.
We can even start the newer filter on a small tote and get it running off to the side with dirty water and QuickBio products.
This is just to get a mock-up running with the new filter while you keep working.
It all depend if it is a 10gal or 100gal.
I'd personally let a friend run his new filter with my dirty water change water, after the heavy stuff settles as well as no fish yet.
-run my terd water for a day or so on the new tank, change that water and filter after the terd water clears, add Quickbio if desired.
So many methods.