Here is the one I got off ebay...check it out good price
http://www.ebay.com/itm/GRN-Elements-78-x-48-x-48-6-5-x-4-x-4-600D-Mylar-Non-Toxic-Grow-Tent-/190604774091?pt=LH_DefaultDomain_0&hash=item2c60ee0acb
Ya bro, I would do a good flush, she still looks good just get her cleaned out. I have a flowering plant that I have to always use week nutes for some reason or it freaks out. There like us man... sensitive lol