CAL-MAG Plus ???

I am noticing that my plant has cal def. which i ran into this prob last grow and bought some cal-mag plus and now i cant find it anywhere (moved 3 times). So ordered some online today, since there is no hydro store anywhere around me normally takes 7 days to get to me, is there any alternative i can use in the mean time?

well water is full of micro nutes

can i add Epson salt?

Epson salts + finely ground egg shell.

sweet thank you, wont cause any fungi or algae right? lol i shall get some Epson Salts and i will have some egg for breakfast