AsNoriuanswered grow question 4mo ago Omg !!! One calls ph 6.5 acidic and low in soil,  other dont understand  anything about nutrients  and how can they be delivered to plant.
Calcium nitrate, epsom salt and if both needed, then its easier  to use CalMag.
In soil grows calcium is almost no needed (same as silica not needed in soil grows) , its abundant  in soil or water ....
That platform should review  this section,  its going beyond  absurd ...