Outdoor Grapefruit but inside, sue me

Another week of problems that seemed to got solved in the end. Another defoliation to better the airflow and remove the dead leaves. Week breakdown: 2021-02-21: Noticeable calcium deficiency probably due to a lockout so I flushed her today. Waiting for results. 2021-02-22: I gave her back the calcium she lost during the flush with 2L of calmag solution. 2021-02-23: Nothing to read. 2021-02-24: Other feeding with the 3 parts base nutrients 8ml of each in 2L of water. 2021-02-25: I defoliated today to remove the dead leaves and get a better airflow. 2021-02-26: Plain water for today pH 6.4 TDS 80 2021-02-27: The calcium deficiency continued growing a bit but it seems stable for now. We feed again tomorrow.