Never had this problem HELP

Hey guys well I dont know what is going on I look to the wisdom of our fellow gardners. This is the first time I have used an ebb and flow system I have always done DWC. These plants are 3 weeks old from seed they have been in ebb and flow 1 week. Orginal fert 18ppm 6.5 ph watered 5 times a day under a 1000 wt lamp 4.5x4.5 ft. I thought at first ppm was to high brought it down to 12ppm still having problems added mg sulpher iron no luck. They look over watered but the balls are dry before watering. They have not grown in the last week much. If no one has any suggestions I am going to drain the system and start over. All COMMENTS WELCOME

thats your problem..... the ph, the nbutes are being locked out.... the ph should be between 5.2 and 5.8

You think so I have always kept my ph between 6 and6.5 never had this out of 10 grows.

pretty damn sure that's the problem..... some nutes aren't locked out above 6, but a lot are..... adjust the ph down to about 5.8 and see what happens.

Which ones? so ILL know

I am going to change all nutes and lower the ph to 5.5 Thanks

Any other opinions? I know there is a lot of us out there