I guess I need to put some good bacteria in my water ,I understood that if the root zone temp water was below 70 degrees Bactrim would not cause root rot but my tires are starting to brown, could the deficiency have anything to do with that?

Every single time .I do something either this plant I hurt it,definitely putting shock on her....lol still trucking tho first grow.So hopefully I will have everything where I want it,res changes made easier so I don't have to be do handsy,cuzz I be hurting my baby...smdh

Any thoughts on what is happening my water temp is 72 degrees my ppm is 990 my ec 1759 idk wtf.I adjusted my lights higher hoping it was burn but I don't think so.