PH to ALKALINITY chart

[merereef]

Can any one share the alk to ph range thats ok for a reef. Example if alk is 10 and ph is 7.8 thats too low etc something to work off when dosing chemicals etc

 

[lapin]

http://www.reefkeeping.com/issues/2004-09/rhf/index.htm

 

[Randy Holmes-Farley Verified Community Expert]

While pH and alk (and CO2) are related mathematically, I’m not sure that the actual level for one strongly impacts the acceptable level for the other.

 

[merereef]

I was told if your alk above 8.4 and ph hobers around 7.8 then thats a sign of highco2

 

[madweazl]

I was told if your alk above 8.4 and ph hobers around 7.8 then thats a sign of highco2

The pH would likely the be the same if the dKh was 12 or 7, too.

 

[Randy Holmes-Farley Verified Community Expert]

I was told if your alk above 8.4 and ph hobers around 7.8 then thats a sign of highco2

that’s true. You can determine CO2 from pH and alkalinity.

 

[Randy Holmes-Farley Verified Community Expert]

The pH would likely the be the same if the dKh was 12 or 7, too.

at the same CO2 level, the pH at a carbonate alkalinity of 12 will have a pH that is about 0.23 pH units higher than the same water with a carbonate alk of 7.

 

[madweazl]

at the same CO2 level, the pH at a carbonate alkalinity of 12 will have a pH that is about 0.23 pH units higher than the same water with a carbonate alk of 7.

Can always count on Randy for the "Spock" answer LOL.