4 plants worth mixing 15 gallons of nutes?

Hiya,
Is it ok to handwater out of 160z bottles instead of mixing up a whole 15 gallon reseviour full or nutes? (seems like such a waste of nutes for 4 plants) dwc, along with aeroponics with sandstone air bubblers for roots in res and topfeed flow system feeding every 4 hrs on for 15 min, hps dimable 600 hps light, anyone know of any good books on growing mj in a supercloset 2.0 deluxe, thanks!
 
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