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