It is doubtfully to do with my tent as I just bought this from hydrofarm who is a well established hydro company and also that if you are referring to the recent indoor tent problems where people were having yellowing of leaves that is from "HydroHut" not "hydrofarm" which is what I use and is a different company, there is also the homebox as well. I think the yellowing has to do more with my nutes and also the fact that my tub is too small and is having trouble supporting the 4 plants. I am dropping the stealth hydro crap nutrients as soon as I have the money. For people wondering if its environmental here are the average temperatures and humidity.
Day/Light On: 78-82 degrees, 23%-45% humidity (uncontrolled)
Night/Light Off: 72-77 degrees, humidity 20%-40%
Once again for those who haven't read, there are no pests, there is no mold, there is no fungi, the roots are healthy, the light is not too close to the plants, the leaves just yellow and it drives me crazy!
P.S. Jordan this is the link to hydrofarms site and the tent I have if you want to look closer.
Hydrofarm - Hydrofarm HA33 Habitat 33 - 3.5' X 3.5' X 6.6'