Pretty crazy, I have the same fan and same filter. Two plants in a two by four. Had been cranking it all the way to ten but now realize the pre filter was dirty and blocking the flow. Probably cut it back to 8 of ten during lights on. Plants are six weeks old and stink nicely but no smell escaping the filter at least for now. I run it on two during the six hour dark cycle. I hadn’t thought of removing the filter when there’s no smell. That will help extend the life I’m sure. Thanks.