if done correctly you will cycle the tank in 4-5 days.
add fish get a good ripe filter and squeeze the bacteria out of it.( I usually squeeze the bacteria into the new filter.
in some cases you may have to change water so monitor the parameters.
I've done filter squeezins in 4 tanks..all 4 cycled within 5 days.
you can add more bacteria if you think the parameters get high. .25 ammonia is the highest I've seen a tank get.
remember when youo do the sqeeze youare adding both beneficial bacteria. so you can add more anytime you feel you need more.
btw..i cycled a tank with discus(long story) using squeezins, with no ill effect to the discus.