Yeah, I know theres a bit on here but this was November 2008 and it wasn't a hydrohut or the likes. My point is that they are still out there and the symptoms start like deficencies, then change to strange chlorosis unlike any deficency photo i have ever seen or experienced. I had plants pure white overnight at one point and upon removing them from the tent they greened up in 3 days. All I am saying is that if you have never had problems before and now you just can't grow a f"ing plant to save your life, It is possible this is answer. I just didn't buy a new tent and everything died. That would be quite obvious wouldn't it .
I changed to a larger system, in a new room with fresh paint and new carpet, also changed nutes because I purchased an ro filter, new carbon filter, ducting, bigger pump, new ph / ec meter so I all of a sudden had lots of variables to consider. I may also mention that the smaller good tent was identical to the new one, from the same place, so it was one of the last things I suspected. There are a million posts about using epsom salts on here too but those symptoms are easy to diagnose and treat. And from my experience magnesium deficency and certainly sulpher is rarely the problem with decent nutes. This is not so simple. I must have looked at this site 100 times and couldnt find any problems that resembled mine. So I thought it was worth a mention.

Just trying to help

Subzero.
subzero Reviewed by subzero on . Warning! Sick plants in a grow tent? read this before doing anything! Hi everyone, I have just had the worst problem in 15 years of growing and now have finally resolved it. I can't see too much about it on this site so I thought I would share this vital information with you.... Stay well clear of any tent with white interior made of PVC. THEY WILL KILL YOUR PLANTS! The symptoms mimmic (sp?) nutrient defficencies, lockout and ph problems and usually end up killing your plants over a couple of weeks from the bottom up. Plant growth will slow, then stop and roots Rating: 5