Actually, it kind of is... it's a simulating what would occur if you completely stocked your tank.IMHO adding 4ppm of ammonia is not a natural occurance and seeding the tank is the best method to assure a fully cycled tank. There is nothing worse than loading the tank with expensive specimens and watching them have problems because it appeared to be cycled.
Regaurdless of whether you seed it or not, test kits generally don't give false readings.. If 4ppm of ammonia is completed converted over night into nitrate, then the cycle is complete... whether or not you seeded. Fishless cycling without seeding is just culturing a small amount of nitrifying bacteria as opposed to a larger amount that you add when you seed. Seeding only speeds the whole process up.
I would be more afraid of using any LFS tank material... that stuff has usually seen every disease out there. Fish come and go from these tanks all the time, bring in new ones all the time. A more safe method would to see if you can find a friend with any established tank and ask if they have filter material or gravel that they would be willing to let you have.
Don't get me wrong, I wouldn't cycle a tank without seeding... but that's only because I'm impatient .
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