High pH

[Randy Holmes-Farley Verified Community Expert]

Are the effects when adding 1tbsp of Kalkwasser to 5g of RO/DI to a 200g tank, the same as your example?

I’m guessing that amount of Kalkwasser would have a much less pronounced effect on the tank than the example above?

Is the ~1dkh jump in alk and 0.2-0.3 jump in pH more in line for my case?

My chemistry is pretty weak but I understand the reactions are not always linear.

Im just trying to understand and plan to correct things as slowly as possible.

Precipitation limits the rise in alkalinity as well.

I do not think there are lingering chemistry issues.

I've had limewater overdoses several times. No correction is needed after the initial pH spike comes down.

 

[Randy Holmes-Farley Verified Community Expert]

If you want the pH lower, just let the alk decline and aerate more.

 

[Matpat]

Precipitation limits the rise in alkalinity as well.

I do not think there are lingering chemistry issues.

I've had limewater overdoses several times. No correction is needed after the initial pH spike comes down.

Thank you!

I assume the initial pH spike is over?

Do you have any idea why the pH is still relatively high?

I will begin aeration and keep an eye on the parameters

 

[Randy Holmes-Farley Verified Community Expert]

Thank you!

I assume the initial pH spike is over?

Do you have any idea why the pH is still relatively high?

I will begin aeration and keep an eye on the parameters

Yes, it was over within a few days.

The pH measurement may be in error, but the pH of seawater at 11 dKH equilibrated with normal outside air will be about 8.4 anyway. Some photosynthesis can easily push that higher if not sufficiently aerated.