word on the ts form......my guess based on pics alone. "fill out the form still or your going to get answeres just like this" ph is a major factor.u have a huge nitro deff, 24-0 will not stimulate major root growth, 18-6 will.you need more light.putting a dome on established plants causes wilting and death,plants that size need fresh air circulation.do u have at least a oscilating fan that u can trow on to them? u need to get your humidity down as well.also as one last thing adding super thrive in this state will only cause more problems than what would be bennefical.soooo in short no domes!!! chech your run off ph a.s.ap get your air circulation going.are u testing your t.d.s before u water? is your medium all ready fertalied? most of these question will be answerd in the form u will fill out but i ask em anyways