How much air circulation do I really need?

Hey everyone! I'm almost at harvest point with my first grow in a 2x2 tent and I would like to make the most of my space before I can get my 4x4.

I currently have two 3ft tall plants and a tower fan in the corner. Given my tight amount of space I have thought about removing the tower fan and doing 4 plants in 3 gallon smart pots.

I have an exhaust fan with carbon filter that can replace all of the air in my tent multiple times per minute and am wondering if this is enough air circulation to get by without it. Any advice?

I replace mine every 3 minutes.

Whats best in a small area like that is to get one of those clip on desk fans attached to the frame to blow right under the light just so the radiant heat doesnt bleach or crisp the top buds. You definitely dont need a tower fan in there taking up prime real estate.

Solid. I will definitely just move this tower fan over to my 4x4 when I get it. Thank you!