Purple Erkle is a medical marijuana strain. KB is just a term for good weed. In that sense Purple Erkle is definitely "kb". Purple Erkle is the most potent weed I've ever smoked, and I've been smoking for 25 years. It's more potent than white widow, silver haze, sour deisel, etc. It's 100% indica with an almost narcotic effect, great for pain but will put you on the couch. It will also seriously mess with your mind though. I've found it to be quite different from other strains. Almost like a mix of opium and mushrooms. You wouldn't want to smoke too much of this and go do anything social. It's best for smoking at home and tripping out with some good music.

$25 a gram sounds a bit steep but Erkle is the most expensive strain I get. I pay about $15 a gram but I buy in 1/2oz so I'm getting a bit of a break. I'd recommend getting Erkle. It's only $25 and if it really is Purple Erkle you won't be disapointed.

Here's a pic from my last bag of Purple Erkle