[plumsmooth]

As a means to completely drop out Nitrogen during last week of flowering? I got some 0-12-24 but how do I add Calcium without adding Nitrogen to my RDWC reservoir?

 

[Kamisama]

U dont need much calcium in last week of flowering.
Ca<Mg<S is what u need to change in flower.

U can use baked shells from egg, sea animals, snails...

 

[Natep]

I make my own water soluble calcium. Cook egg shells till they are golden brown.soak them in vinegar. They will desolve mostly.
Use at a 1000:1 ratio