I like to run at least 2 oscillating clip on fans in my tents, no matter the size. My smallest tent is a 3x2.
Can come in handy to be able to run 1 bottom of tent if humidity or air flow issues arise and still have 1 up top.
I use the fans to move air around the tent, not to blow on plants.
I keep a 16” oscillating fan on the floor, and a small 6” stationary fan near the ceiling blowing across the lights those are the only 2 use in my 4x4 (plus the exhaust ofc)