First grow-FB-Forbidden Runtz

Noticed a little tip yellowing in each but Day 50 or So Dori's leaf veins in the main cola went purple after going a light yellow green. Potentially a calmag issue I thought and further yellowing seemed to confirm. Day 52 fed .75Liters each with just under 1ml/l CalMag and PH'd to ~6.5. Tonight I took photos of some of the spotting that has started to happen, looks most like a Calmag issue so hoping that the feeding from last night prevents the spread. Will be watching closely and any tips are recommended. Day 54 fed .5L each with 2.5ml/L Fish Shit as recommended by hydro store locally. D 55 no real change plants still slightly damp Day 56 fed .5L each with 1ml/L of Bloom A/B, and Carboload with 2.5ml/L of Fish shit, .5ml/L Overdrive, and 2 ml/l of Cal-Mag to hopefully reverse what is looking like a calcium deficiency. Plants were dry and ready for water and perked within an hour afterward. Day 57-AM which is before their lights out not much change but the two most effected leaves were showing increased spotting and black spots. Really looking for help identifying this and fixing. PM-Color and perk looked a lot better after their lights out but the worst effected leaves were showing their spots much clearer and the center veins lower on the plant where everything is still nice dark green is starting to go purple like the top did. Picked up some recharge and looking to water with Cal-Mag, Recharge, and Fish Shit tonight or flush depending. Halp! PM Update-Flushed with 1L of 2 ml/L CalMag and a .7g dose of Recharge. That didn't drain them into the pans this time so I fed another .5L to finish the flush. Fed Dori 6.5PH and Guppy 6.2PH. Vivosun pen broke immediately following calibaration so I bought a nicer pen locally and I'm exact now!