hi, thanks for your reply.
yes, i'm remineralising my water. i keep my gh
at 5 and use an alkaline buffer.
i have control over all water parameters and my initial goal was to raise ph to 7.8 in order for the co2
to keep it down at 6.8. problem doing so is my kh
raised too in doing that so lowering ph to 6.8 would be out of balance with the recommended value for KH
9 ( which is what i have at the moment).
that's why i feel a bit stuck!
if i raise ph to get the co2
pumping, then KH
is going to raise too and keep chasing it can only end in disaster.
if i don't raise the ph, then the water sits at 7.1 and that would mean co2
would notbe released.
if i set the regulator to keep the ph down to, say, 6.1, then i would have co2
distribution but, according to the chart, i would end in the red zone quite badly.
it would be in the red even if i set it at 6.8 and that would not release a lot of co2