your having ph issues, in turn are making a lock out and your seeing issues that look like deficiencies. your trying everything and nothing works. well heres what you need to do to clear things up,
flush your plants until your run off ph is at a 6.0 reading.
next let the pots dry out for a day or two, start a feed with cal mag. use half of what the label says for each feed. when you have ph issues this will effect the plant in many ways, a poor harvest, slow growth, and all the ugly leaves, ect.
if you do not fix you ph then you will have problem after problem.
so get a ph meter if you do not have one yet