Alkalinity stability? pH stability? Are they even different?

[Miami Reef]

Hello @Randy Holmes-Farley

Would you mind calculating which scenario has more carbonate?

1)
Alkalinity: 7dKH
pH: 8.4-8.5

2)
Alkalinity: 10dKH
pH 8.1-8.2

 

[Randy Holmes-Farley Verified Community Expert]

Hello @Randy Holmes-Farley

Would you mind calculating which scenario has more carbonate?

1)
Alkalinity: 7dKH
pH: 8.4-8.5

2)
Alkalinity: 10dKH
pH 8.1-8.2

Rough calc is #1 (8.45 vs 8.15) but they are fairly close and a full calculation might show the opposite or the same.