Your nutes will vary by as much as 200 ppm when the water evaporates and the plants feed. As water level goes way down, the nute level will go way up (1200-1400 ppm) & pH up also. Just add water (no nutes) to reservoir after you have added carbs, B1, Pro Silicate, SM-90, etc & adj pH to 5.8
monty5309 Reviewed by monty5309 on . tap water ppm q's hey folks ppm q's for ya . been at this a lil while w/o probs. but i'm curious , our tap wtr is 80 ppm. if i mix my nutes to be lets say 1000ppm. should i make it 1080ppm. because of ppm. of plain tap water ?:confused: thanx in advance n peace :thumbsup: Rating: 5