Well I just read your post again and the reason mine is the waye it is is due to my soils ph being to low. Yours seems fine. I probably would change your res. water and clean the tub and when you add the nutes, give them 1/4 strength for about 1 week and then gradually increase it. You might be right on the nute burn. I am not growing hydro so I am not too sure. I know you are supposed to mix the nutes in the water 1 at a time. Do you have any pic's of your setup?
Weed4Life Reviewed by Weed4Life on . HYDRO PROBLEM, HEEEELP!!!!!!! System: Hydroponic, ebb and flow, 40 liters tapp wather. Nutrients canna substra flores. Day temp 26-28 Celzius. Nitgh temp 22-24 C. PH 5,7-6,1. Nutrient temp 22-23 C. Humidity 55-60 %. Ligth 400 hps. EC tryed 1,6-2,0. After 4 days of flowering the problem acured. I thougth it was a nutrient burn, so I took EC down to 1,3 - 1,6 , that did not help. Using magnesium (epson salt). EC of the pure wather is 0,06. Wathering every hour for 5 min, have a sirculating pump in solution. Problem acure 4-5 Rating: 5