Hi, All, I have a Dr120, 600 lite, cooled through the filter on the extraction fan,RVK125E-A1... the inlet fan is drawing in from outside which is a RVK125E2-L1, but it dos'nt seem to putting enough in , if I shut tent completly, the tent sucks in , if I reverse the fans, then the tent blows up like a ballon ,should i get another RVK 125E-A1, to eqalize I also have a fan inside the tent, and my temps (light on)are hitting 85's