How much kalkwasser for reefer 170?

[RockusDukakis33]

My PH is constantly low. After a water change, it sits at 7.7 and dips below that till the next water change. The current Alkalinity level is 10.9. How much Kalkwasser should I dose a day in order to raise and maintain my PH levels?

I did buy a dosing pump I can utilize to gradually dose each day.

 

[jimk60]

My PH is constantly low. After a water change, it sits at 7.7 and dips below that till the next water change. The current Alkalinity level is 10.9. How much Kalkwasser should I dose a day in order to raise and maintain my PH levels?

I did buy a dosing pump I can utilize to gradually dose each day.

You can't really use kalk to maintain pH alone as it will also raise alk How are you maintaining your alk level now?

 

[RockusDukakis33]

Looking back at test result it looks like my alk goes from 10.9 after a water change down to 8.2 at its lowest before.

 

[ReefEco]

As @jimk60 suggests, it is not a simple question - as your bioload and ALK uptake will influence your pH and levels. If you have a doser that is great - start slow and gradually increase. If you have alot of calcium/alk demand, you can usually replace all ATO topoff water with kalk (keep your kalk on a doser, not in your ATO reservoir if you can)...

 

[jimk60]

Might want to try a salt that mixes lower alk like maybe 8.0. then dose the kalk to take the alk to the level you want. This will also boost your pH.

 

[Randy Holmes-Farley Verified Community Expert]

Do you currently supplement alkalinity?

 

[RockusDukakis33]

Do you currently supplement alkalinity?

I do not. It was at 10.9 after a 10% water change on June 9th and 10.8 on June 16th.

Calc was at 455 on June 10th after I supplemented it and 425 on June 16th

 

[Eoka]

I have a 125g and with some acros and other lps so it's really dependent on how many corals your have. Right now I just use my ato to maintain my kh levels. My ph sits at 8.5. I mix 1 teaspoon of kalk per gallon of rodi water. The max amount is 2 teaspoon and that'll make a 100% concentration solution.

I do not. It was at 10.9 after a 10% water change on June 9th and 10.8 on June 16th.

Calc was at 455 on June 10th after I supplemented it and 425 on June 16th

 

[Randy Holmes-Farley Verified Community Expert]

I do not. It was at 10.9 after a 10% water change on June 9th and 10.8 on June 16th.

Calc was at 455 on June 10th after I supplemented it and 425 on June 16th

It doesn’t sound like you need alkalinity at all?

If you choose to fuse it, start very slow.