How hot is your room? What lifecycle are you in? The nuts depend on the phase of your plant... The General Hydroponics website has a phase cycle. Find what phase you are in and add accordingly. Also, do you have hard water, ro, or what water source are you using??? I view my tank and when the water is turning from an orange to a ruby color your ppm is too high. Do you add water ever 2-3 days to dilute the concentrate?