Orange Sherbet Auto FastBuds

05.03.2021 DAY 50 19:00 Watered frankenstein with 6L of demineralized water with canna normal feed chart divided by 2.25. Runoff was around 6.6ph so I watered with 5 liters of 5.7ph pure demineralised water and 5l of same feeding from the canna chart ph'd to 5.6 divided by 2.25 . And the runoff was again 6.55. I think a because of the calcium buildup from tap water that is hard with 300ppm and a lot of calcium in it. The plant doesnt look that good. Its rusting and yellowing. I don't like it. And the same simptoms started showing on the other plant. We will see. 07.03.2021 DAY 52 23:59 Watered plant#2 which is starting to get pale and getting rust spots on uper leaves. Watered with 6L of tap water mixed with tap water satarting ppm 120, added everything by the canna feeding chart devided by 2.1, ph 6.43, 570 ppm. Runoff was 1040 ppm so the plant probably locked nutrient ultake and thats why yellowing and rust spots appearing. Didn't have time to do a flush so next watering its going to be demineralised water leaching. 09.03.2021 DAY 54 11:00 Watered frankenstein with 6L demineralised water plus canna feeding chart devided by 2.2 and 2.5ml of cal/mag, ph 6.1, 550 ppm.The plant is looking better and greener after the flush. Flushed plant#2 with 20L of demineralised water ph'd to 6.3 and measured runoff only after the flush which was 6.65ph. Crazy but it is the exactly the same as frankenstein. I would say calcium buildup in the mediumfrom very hard water with initial ppm of 330 raising the ph and locking plant nutrient intake. I think it is going to recover after the flush.