scrubber help (asap

I purchased a carbon air filter from my local hydro shop. Its a hydrofarm active air filter over 2 feet long 6 inches wide. I have a 6x10 bathroom grow in veg right now but my whole house already smells like weed.

I already have a fan pushing through 6inch flex duct through my 1000 watt light reflector and Vented through the ceiling exhaust (I removed the bathroom ceiling fan so it has less restrictions)

I also have a duct vent that blows ac in intermittently. I think when the ac kicks off it leaks throughout the duct to other rooms.

So... I want to just plug the scrubber to a separate fan (do not exhaust) and just have it recirculate in the bathroom. My question is on the package it says my scrubber is rated for 50 cfm. Isnt that really low? I tried using my 50cfm bathroom fan that I had laying around. Dosnt do jack. How high of a cfm can I go before its flowing through the scrubber too fast and not scrubbing? Can i use a 190 cfm inline fan? Or some other duct can fan/80 cfm from home depot? Dont want to wait till one comes in the mail, however I will if need be. Thanks guys!

I just woke up, but if I understand correctly- You need to create negative pressure in the room to get rid of the smell. The only air leaving the room should be through the exhaust. When you're inside the room, any opening other than the exhaust should be pulling air into the room and you should be able to feel it.

Negative pressure only requires that the air coming in is less than the air being exhausted out, but from what I've read, most folks try to circulate all the air once/minute. So, if that room has 8ft ceilings, it is 480 sq ft (6'x10'x8'), you would want an exhaust fan that is at least 480cfm- But again, thats just the common thing I've seen, not required to create negative pressure. What's important is that the air coming in is less than the air going out which requires the room to be well sealed. Its amazing what the little 1/4" strips of foam weather sealing will do.

* If you simply recirculate the air within the room, you won't achieve negative pressure, you're not moving air out and bringing new air in.

Bathroom exhaust fans are relatively low in terms of cfm, but if the room is well-sealed, you should be able to achieve negative pressure.