Strawberry Cough 4x4 Indoor, 480w LED

Not much except that the runoff PH is going out at 6.5-6.8 and I don't know why, maybe I overdid the K while I was waiting for the PH meter replacement, OR, I think it is my tap water that has 250ppms of Ca and MG. I was researching for its contents today and it is almost 80% CaCO, 10% Mg, and 10% Na. I am now considering getting a water filter to lower that down a bit. It is also REALLY alkaline, meaning you need to add a lot of PH down. I also noticed that the lower I put the input solution, like 5.5, the higher the runoff so I think it ends up precipitating and making the runoff more alkaline. Plant A has been flushed for 2 days with just some PH water at 5.8 and a bit of K from an unknown fert maker, but it contains mostly soluble K + free aminos and no P, cause I don't want to have it there. I am also thinking they are root bound. I should not have flowered in those pots. Plant B is still under fill feeding schedule with Canna AB + extra K and yesterday I watered a LOT ( 8L) with PH water at 5.8 to get it down to 6.2.