Yes the tank will cycle no problem with purigen, carbon, massive water changes, etc, etc. etc. People worry way too much about the cycle and adding fish too quickly. Especially in a planted tank there is BB everywhere and eventually most of it is in the tank not in the filter.
What purigen, carbon does is it removes some of the waste since the bio-filter is too immature to do so in the beginning. once the BB matures and the plants grow in you usually don't need purigen or carbon and the water changes are enough.
Ever notice Eheim includes a carbon pad when you buy a filter? ADA recommends that the majority of media at the setup is carbon? It's more important to keep the tank low on organics then it is to maximize organics for the cycle. This is a major reason why so many have algae issues at startup.
Last edited by houseofcards; 05-11-2018 at 11:17 PM.