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 will die, bizarre chlorosis will occour, stems will be weak and thin, leaves will curl over and under, burn and drop. Whole plants have turned completely bright yellow overnight in extreme cases.
cheap white grow tents or plastics put off toxins that will kill your plants!