Outside shot probably not there is something wrong with the media mix.
Are they standing in water for any length of time
Looks PH problem I believe your showing 3 different deficiencies usually that a PH thing.
Soil? And what nutes? Looks like they are still young enough to be thriving on soils nutes.. my guess, you added N and overwatered slightly. They'll be fine, let them get bone dry, do not feed, only water.. use distilled water for a week to get them back on track