I've heard general hydroponics is really good. I've had good results with the humboldt nutrients base line of grow micro and bloom. On there site the have a general feeding chart which is quite useful for people new to growing. I'm still pretty unfamiliar with all the different nutes but all the guys at the hydro store swear by gh so I'll be switching after my next grow. Their decently priced too. I'm almost positive that all companies have a generalized feeding chart. Hope this helps somewhat.