S
SeaMaiden
In my direct experience using it as a filtration media, absolutely it does.but arnt humic substances capable of taking out some of the cal and mag ions that would make water "hard"?
peat has a softening effect in water?
So it IS possible to 'break' the molecule and make that Ca available! Does it matter which acid you use..? For example, my recipe for disaster involves freezing acetic acid three times in order to distill or concentrate it (to what acidity at the final extraction I don't yet know). Assuming it's sufficiently acid enough, what you're suggesting is that I can break the CO3 bond with Ca (or Mg..?) which would make all this Ca I think is in the water column available for plant uptake.If the water hardness is CaCO3 you can make it available in water by acidifying the water. For example if you use nitric acid the reaction would be:
CaCO3 + 2HNO3 = Ca(NO3)2 + H2O + CO2
by the time you lower the pH to 4.5 it all would become available. So if you don't want that free Ca leave your water pH above 7
sorry about that...can't help myself sometimes
I'll have to keep this stuff away from Black Chasm.