Question Re: Air Circulation in Grow Tent

I just got a 5'x5'x6.5' grow tent for flower. I already have a 3x3 tent that I will be using for veg. In the 3x3 I had to 6" clip on fans on the poles, it circulated the air pretty well. In the 5x5 the 2 clip on fans are just not enough.

I am not sure if I should use like 4 clip-on fans, or 1 or 2 oscillating pedestal or tower fans, or somehow mount 2 wall mount fans, but not sure how to mount them.

any help or advice is greatly appreciated it.
thanks.

Usually 2 in each tent should do sufficient air ciruclation, consider 2 up top and 2 below the canopy, maybe that would help a bit.