WOW i have used ipower vivosun terrabloom so let me start by saying for veg there all fine but we all know there's little to no smell during veg now during flower all carbon filters stopped working within 4 weeks into flower i even had the biggest terrabloom has to offer which was so big it took up the whole top of the tent and still smelled and iRead more about review stating THE BEST CARBON FILTER ON THE MARKET mean you could really smell it bad and it was really scaring me i have neighbors to worry about so much i was making it my last grow i figured i would try the ac infinity version before i stopped growing and after installing the ac infinity carbon filter OMG the smell is completely gone and i mean completely gone and the plants are in full flower so these carbon filters allowed me to continue growing thank you so much ac infinity everyone reading this ignore any negative comments you may run across and take this comment as gold these carbon filters are truly outstanding beating any and all competition out there