Grow tent walls suck in from exhaust

I am running two 6" fans and my tent looks like it is going to implode. One thing I did was to get some #5 smart pots and wrap a round frame with the pot and use the open floor ports with the new light tightish filter plug. You can also use 8" 90’s x 2 paint the inside with flat black and bend the tubes in opposite directions and cap with a #3 smart pot.