Quote Originally Posted by Padde
I bought rocks in the shop, offcourse.....and my friend uses them with great sucses.....and I wash them good beafore using.....How is it posible to overfert when I´m keeping EC under 2,0???? There was no change from last night, they are still getting worse. Ph this morning was 5,6 and Ec 1,71. Thanks for your help.....
I didn't say overfert I said toxidity. that can build up in your medium.

On the subject of flushing. flushing for 1-2 hours is a waste of time. If you have problems and want to clean out the toxidity problem in a plant you flush with water for 1-2 days...not hours. looks like you are doing OK.

Your small bud problem over 4-5 grows could be not enough light. peace
latewood Reviewed by latewood 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 Rating: 5