EC too high and leaf yellow

Iron deficiency. But can also be a lockout iron not available to plant with whacked out ph! Ph should be between 5.0 5.5. Ec is probably too high. I’d flush with a milder solution like .6 then bump it up to .8 with a ph of 5.5. And cal mag it after it comes back. U should see improvement by the next day if not it’s something else. I think 1.4 is too high for Little plants shit I don’t ever go past 1000 ppm or 1 point ec But I grow organic soil so i just top dress. but I do know I had that same problem and it was iron. And I fixed it with flushing with ph balanced water and mild nutrition.