Well, im working on setting up a hydro system. I've got it all built, I just dont know what type of nutrients to feed it now. Ive heard people mention something called pure blend pro which ive found on some various sites. I was wondering what exactly I need though, Do I just order one of these pure blend pro grow hydro nutes? im pretty lost on the whole nutrient part, I dont know what to do when it comes to this part. any help is appreciated.