Its hard to say...read my new nutrient thread, maybe that will help you...

gh 3-part...just buy micro and bloom...buy gallons, alot cheaper
canna nutes. read up on them, i haven't used them, but they are a favorite wiht lots of growers.
botanicare pure blend pro/bloom for hydro (organic)
botanicare is a great co. you could try there line. they make cal mag+ and liquid Karma...