*sigh*
BB is pretty much a formula, it is life... you give it media to grow on and a food source, aka cultivating bacteria. 1>2>4>8>16>32> etc etc, it takes time to divide & create cell walls and structures! Given the right nutrients too... hence throwing in ammonia is just weaksauce, gotta have rotting foods and whatnot (the building blocks of life yes?)
*sigh* this is getting too complicated, go take a cellular biology course or something.
Granted bacteria grows at an optimum temp. and whatnot, but to "expedite" the process is a loada joke. I say fully cycle 3-4 weeks AT BEST without help from an established media.
Fishless cycling wont hurt a fish, cycling with fish will to some extent, maybe not ammo-burns, but irritating eyes and skin no doubt will occur. At the very least get SUPER hardy fish and can take a beating and recover quickly.
Just an FYI, I cycled my 150g tank in just over 3 weeks and just to see how long it would take with 3 goldfishes. [Yes they're alive and well]
a) i went through ++100g of water, finished my API test kit, and market shrimps that rotted pretty good cause the goldfish picked/finished it off.