I just bought a hydrofarm tent (3'5",3'5",6'6") from my local shop. Then after I bought it I saw online that there were problems with the fabric leaking gases...but all of those posts seem to be from 2008. Does anyone know if these tents are safe now? And is there a way to ensure my tent is newer and not old stock from 2008 that has the problem? Thanks for any help!