I am pretty positive those fans dont put out anywhere close to as much ozone as the one that he recommended, I have used ozone fans that are similar and they don't really work for a grow < or at least my grow.and another thing that shows how big a difference is you can have one of those fans in your bedroom You can't/shouldn't use the Ozn-1 in any living area It will give you a sorethoat if exsposed to it too long before it changes back to O2. It should be in your ducting before you vent outside. Or in a dead space that all your exshaust goes to like an attic where it can dissapate slowly . I also have a friend who grows quite a bit who uses the DIY carbon filters and one of these
He puts its on in his basement in the room next to the grow and it does its job ok .
But I just got the one that panhead recommended (craigslist 2 weeks old 75$) and it is much stronger then the ozn jr. and I am super happy with it. I also like DIY carbon filters and would say to anyone who is looking for a good cheap way to fix a smell issue is to make one, they work well and if you have no smell problem with them then there is no reason to upgrade. But if you do decide/need to upgrade I would suggest the ozone generator if it will work for your setup. For those reading this and haven't seen a DIY carbon filter here is one version
https://www.rollitup.org/grow-room-design-setup/63004-my-3-carbon-filter.html