Best way to stabilize Ph

reeferdon

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My PH is fluctuating between 7.70 and 8.0. How do I stabilize it? I'm running the BRS C02 scrubber and it really didn't help much.
Due to the Cons of using Kalk, I'm not sure if I want to go that route.

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Randy Holmes-Farley

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IMO, it's more important to raise it than to stabilize it.

What are the cons of limewater (kalkwasser) that concern you?

Outside air to the room or to a skimmer inlet can raise pH, as can CO2 scrubber air to a skimmer or more photosynthesis (like macroalgae in a refugium lit at night).
 

Miami Reef

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The first step is properly calibrating the PH probe.

I would increase tank aeration (get heavy ripples on the surface of the water, use your skimmer.

If that doesn’t work, open some windows and see.

Use kalkwasser or 2 part with sodium hydroxide for the alkalinity part.

CO2 scrubbers should work. A combination of the above should certainly raise your PH.
 
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reeferdon

reeferdon

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The first step is properly calibrating the PH probe.

I would increase tank aeration (get heavy ripples on the surface of the water, use your skimmer.

If that doesn’t work, open some windows and see.

Use kalkwasser or 2 part with sodium hydroxide for the alkalinity part.

CO2 scrubbers should work. A combination of the above should certainly raise your PH.
Now that you mention caliber the PH probe, I may need to replace it. I'll try that.

My concern about kalkwasser is I've never used it.
 
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reeferdon

reeferdon

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I replaced the PH probe and calibrated it. What do you think.
 

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reeferdon

reeferdon

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I'm using a medical grade C02 media that seems to be more stable than the hobby grade media. However now it's on the high side 8.14.
 

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arking_mark

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Randy Holmes-Farley

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I replaced the PH probe and calibrated it. What do you think.

When in that screenshot did you replace the probe?

The cycling looks pretty normal. A bit on the low side, but not a big deal unless max coral growth is the goal.
 
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