Effectively using 1 ac unit for 2 separate tents

[solarz]

it is a 4 inch 100 cmf fan that i use as an intake fan. I use that same fan for both tents. the outake fan is a 8 inch 500cmf fan.

 

[dongle69]

That is certainly a problem.
Right now your 4 inch fan is choking the air supply to the tent.
You can't have 100 cfm in and 500 out.
Try removing the 4 inch fan completely and opening any other vents on the tent.
Most tents have 4 duct holes.
Use the 3 unused vents as passive intakes (no fan).
That way your 8 inch exhaust fan can actually move some cfm through the tent.

 

[solarz]

WEll, it's not a prefab'd tent. Its a DIY tent out of 2x4's and refletix. Any other suggestions? Also i was trying to fix this to were there weren't any light leaks, and they can operate w/o me having to be here to manually open to doors

 

[dongle69]

I would still remove the 4 inch fan and increase the area of the intake.
It needs to be at least 10% bigger than your exhaust.
Your 8 inch exhaust has an area of about 50 square inches.
You need a minimum of 55-60 square inches of intake.
More would be even better in your case.
A couple of 8 inch intakes would be nice.
You could use short pieces of flex duct or something else that allows for a bend so air can get through but not light.
They don't have to be round, I was just using that as an example.
You could have a rectangle cut out as long as you could block the light.