Too little info for a diagnosis, but what's your ingoing water ph? Just because it's bottled does not necessarily mean it's ph balanced. Is there a problem with your tapwater?

No nutes for the first month or so using Miracle Grow, then half-strength nutrients and watch for their reaction.

If your water ph is within range, copy-n-paste the troubleshooting form, and fill it out as best as you can. (a link is in my signature)