@Kreewl Hi mate it could be that when you sprayed them with the ryzo the droplets of water left on the leaves were magnified by the lights which created the burns If you are foliar spraying I reccomend it be done just prior to the lights OFF period Good luck with your Barneys gro I love their stuff!!

If you are using seedling specific soil like Light Warrior or Espoma, no need to use any nutes! When transferring those seedlings to your permanent soil, most likely you won't use any nutes for at least 30 days, as most quality soil is loaded with micro nutrients. After that, as previous poster said, only use 50% strength going forward, to see how plants tolerate it. Spray those seedlings with either distilled water, or purified drinking water, to eliminate any hard metals or chlorine. Don't mean to be condescending if I sound like it.