When you start using lucas formula and stuff like that is when it matters..cause if you add back a gal of nuted water cause yur low,this is wen it spikes...nutrients is like the 5th most important thing when growing,lights,ventilation,air movement,medium,temps/humidity this is what to focus on.people who want full nutes constantly r ones chasing deficiencies...regardless of full nutes,3/4,or 1/2 nuted your plant is only gonna drink the nutrients it wants at the time it wants it...you r just making all the nutrients available it may want..