Ca and Mg are antagonistic as far as uptake is concerned.
If you think you have a Ca issue then deal with Ca and not Ca/Mg at the same time.
Somebody mentioned a Ca foliar, previously in this thread, that has worked for them and If I were you I would explore that route as long as you are led to believe you have a Ca deficiency.
Too much Mg will lockout both Ca and Mg.
I'm not a hydro guy and do not supliment CO2 so take this with a grain of epsom.
If you think you have a Ca issue then deal with Ca and not Ca/Mg at the same time.
Somebody mentioned a Ca foliar, previously in this thread, that has worked for them and If I were you I would explore that route as long as you are led to believe you have a Ca deficiency.
Too much Mg will lockout both Ca and Mg.
I'm not a hydro guy and do not supliment CO2 so take this with a grain of epsom.