Relativly low PH and 6 dKH consumption daily (kalkwasser + c02 scrubber + carbonate dosing)

[karsie]

dKH seems to be stable around 6.4/6.7 mass consumption stopped (now around 0.3/0.4 dKh daily). Dosing bi-carb again to slowly rise to 7dkH.

 

[Randy Holmes-Farley]

Thank you, can I start dosing carbonate again or must it be bi carbonate?

Bicarbonate is better to keep precipitation low due to the lower pH.

 

[karsie]

Yes dosing bi carb! Noticed that I do get a little bit of ph increase. maybe because the bi carb already is in solution for a while

 

[Randy Holmes-Farley]

Yes dosing bi carb! Noticed that I do get a little bit of ph increase. maybe because the bi carb already is in solution for a while

I'm not sure what you mean. When first added, bicarbonate always causes a small pH drop. Then the pH may rise back up to where it was, or even a bit higher, if you substantially raised the alkalinity.

 

[karsie]

I'm not sure what you mean. When first added, bicarbonate always causes a small pH drop. Then the pH may rise back up to where it was, or even a bit higher, if you substantially raised the alkalinity.

Yeah the solution did that when freshly made but now I see a small increase in pH with the bi carb I created. But with dosing 10ml on 165l it's only 0.02 ph wat less then with carb

 

[Randy Holmes-Farley]

Yeah the solution did that when freshly made but now I see a small increase in pH with the bi carb I created. But with dosing 10ml on 165l it's only 0.02 ph wat less then with carb

OK, the bicarbonate solution may have lost CO2 to the air.