CaSO4(gypsum see agriculture supplies))
Ca(NO3)2 if you need a little Ca and need to add NO3
CaCl2 Calcium chloride- deicer, pool calcium hardness increaser, air dyer media, etc,
.......all are much easier to dissolve than CaCO3
Also, SeaChem Eqilibrium will add some(via CaSO4)
You should be able to find gypsum there cheaply.
Regards,
Tom Barr
Ca(NO3)2 if you need a little Ca and need to add NO3
CaCl2 Calcium chloride- deicer, pool calcium hardness increaser, air dyer media, etc,
.......all are much easier to dissolve than CaCO3
Also, SeaChem Eqilibrium will add some(via CaSO4)
You should be able to find gypsum there cheaply.
Regards,
Tom Barr